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CMake/Source/cmCoreTryCompile.cxx
Robert Maynard 574f71efba try_compile: Refactor language standard level parsing 
cmCoreTryCompile had significant code duplication around handling
languages that offer standard levels. This refactoring reduces
the complexity and makes it easier to add new languages in the
future.
2020-06-17 06:30:39 -04:00

1050 lines
38 KiB
C++
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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmCoreTryCompile.h"
#include <cstdio>
#include <cstring>
#include <set>
#include <sstream>
#include <utility>
#include <cmext/string_view>
#include "cmsys/Directory.hxx"
#include "cmExportTryCompileFileGenerator.h"
#include "cmGlobalGenerator.h"
#include "cmMakefile.h"
#include "cmMessageType.h"
#include "cmOutputConverter.h"
#include "cmPolicies.h"
#include "cmState.h"
#include "cmStringAlgorithms.h"
#include "cmSystemTools.h"
#include "cmTarget.h"
#include "cmVersion.h"
#include "cmake.h"
namespace {
class LanguageStandardState
{
public:
LanguageStandardState(std::string&& lang)
: IsEnabled(false)
, DidStandard(false)
, DidStandardRequired(false)
, DidExtensions(false)
, StandardFlag(lang + "_STANDARD")
, RequiredFlag(lang + "_STANDARD_REQUIRED")
, ExtensionFlag(lang + "_EXTENSIONS")
{
}
void Enabled(bool isEnabled) { this->IsEnabled = isEnabled; }
bool UpdateIfMatches(std::vector<std::string> const& argv, size_t& index)
{
bool updated = false;
if (argv[index] == this->StandardFlag) {
this->DidStandard = true;
this->StandardValue = argv[++index];
updated = true;
} else if (argv[index] == this->RequiredFlag) {
this->DidStandardRequired = true;
this->RequiredValue = argv[++index];
updated = true;
} else if (argv[index] == this->ExtensionFlag) {
this->DidExtensions = true;
this->ExtensionValue = argv[++index];
updated = true;
}
return updated;
}
bool Validate(cmMakefile* const makefile) const
{
if (this->DidStandard) {
makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmStrCat(this->StandardFlag,
" allowed only in source file signature."));
return false;
}
if (this->DidStandardRequired) {
makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmStrCat(this->RequiredFlag,
" allowed only in source file signature."));
return false;
}
if (this->DidExtensions) {
makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmStrCat(this->ExtensionFlag,
" allowed only in source file signature."));
return false;
}
return true;
}
bool DidNone() const
{
return !this->DidStandard && !this->DidStandardRequired &&
!this->DidExtensions;
}
void LoadUnsetPropertyValues(cmMakefile* const makefile, bool honorStandard,
bool warnCMP0067,
std::vector<std::string>& warnCMP0067Variables)
{
if (!this->IsEnabled) {
return;
}
auto lookupStdVar = [&](std::string const& var) -> std::string {
std::string value = makefile->GetSafeDefinition(var);
if (warnCMP0067 && !value.empty()) {
value.clear();
warnCMP0067Variables.push_back(var);
}
return value;
};
if (honorStandard || warnCMP0067) {
if (!this->DidStandard) {
this->StandardValue =
lookupStdVar(cmStrCat("CMAKE_", this->StandardFlag));
}
if (!this->DidStandardRequired) {
this->RequiredValue =
lookupStdVar(cmStrCat("CMAKE_", this->RequiredFlag));
}
if (!this->DidExtensions) {
this->ExtensionValue =
lookupStdVar(cmStrCat("CMAKE_", this->ExtensionFlag));
}
}
}
void WriteProperties(FILE* fout, std::string const& targetName) const
{
if (!this->IsEnabled) {
return;
}
auto writeProp = [&](std::string const& prop, std::string const& value) {
fprintf(fout, "set_property(TARGET %s PROPERTY %s %s)\n",
targetName.c_str(),
cmOutputConverter::EscapeForCMake(prop).c_str(),
cmOutputConverter::EscapeForCMake(value).c_str());
};
if (!this->StandardValue.empty()) {
writeProp(this->StandardFlag, this->StandardValue);
}
if (!this->RequiredValue.empty()) {
writeProp(this->RequiredFlag, this->RequiredValue);
}
if (!this->ExtensionValue.empty()) {
writeProp(this->ExtensionFlag, this->ExtensionValue);
}
}
private:
bool IsEnabled;
bool DidStandard;
bool DidStandardRequired;
bool DidExtensions;
std::string StandardFlag;
std::string RequiredFlag;
std::string ExtensionFlag;
std::string StandardValue;
std::string RequiredValue;
std::string ExtensionValue;
};
}
static std::string const kCMAKE_C_COMPILER_EXTERNAL_TOOLCHAIN =
"CMAKE_C_COMPILER_EXTERNAL_TOOLCHAIN";
static std::string const kCMAKE_C_COMPILER_TARGET = "CMAKE_C_COMPILER_TARGET";
static std::string const kCMAKE_C_LINK_NO_PIE_SUPPORTED =
"CMAKE_C_LINK_NO_PIE_SUPPORTED";
static std::string const kCMAKE_C_LINK_PIE_SUPPORTED =
"CMAKE_C_LINK_PIE_SUPPORTED";
static std::string const kCMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN =
"CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN";
static std::string const kCMAKE_CXX_COMPILER_TARGET =
"CMAKE_CXX_COMPILER_TARGET";
static std::string const kCMAKE_CXX_LINK_NO_PIE_SUPPORTED =
"CMAKE_CXX_LINK_NO_PIE_SUPPORTED";
static std::string const kCMAKE_CXX_LINK_PIE_SUPPORTED =
"CMAKE_CXX_LINK_PIE_SUPPORTED";
static std::string const kCMAKE_CUDA_ARCHITECTURES =
"CMAKE_CUDA_ARCHITECTURES";
static std::string const kCMAKE_CUDA_COMPILER_TARGET =
"CMAKE_CUDA_COMPILER_TARGET";
static std::string const kCMAKE_CUDA_RUNTIME_LIBRARY =
"CMAKE_CUDA_RUNTIME_LIBRARY";
static std::string const kCMAKE_ENABLE_EXPORTS = "CMAKE_ENABLE_EXPORTS";
static std::string const kCMAKE_LINK_SEARCH_END_STATIC =
"CMAKE_LINK_SEARCH_END_STATIC";
static std::string const kCMAKE_LINK_SEARCH_START_STATIC =
"CMAKE_LINK_SEARCH_START_STATIC";
static std::string const kCMAKE_MSVC_RUNTIME_LIBRARY_DEFAULT =
"CMAKE_MSVC_RUNTIME_LIBRARY_DEFAULT";
static std::string const kCMAKE_OSX_ARCHITECTURES = "CMAKE_OSX_ARCHITECTURES";
static std::string const kCMAKE_OSX_DEPLOYMENT_TARGET =
"CMAKE_OSX_DEPLOYMENT_TARGET";
static std::string const kCMAKE_OSX_SYSROOT = "CMAKE_OSX_SYSROOT";
static std::string const kCMAKE_APPLE_ARCH_SYSROOTS =
"CMAKE_APPLE_ARCH_SYSROOTS";
static std::string const kCMAKE_POSITION_INDEPENDENT_CODE =
"CMAKE_POSITION_INDEPENDENT_CODE";
static std::string const kCMAKE_SYSROOT = "CMAKE_SYSROOT";
static std::string const kCMAKE_SYSROOT_COMPILE = "CMAKE_SYSROOT_COMPILE";
static std::string const kCMAKE_SYSROOT_LINK = "CMAKE_SYSROOT_LINK";
static std::string const kCMAKE_Swift_COMPILER_TARGET =
"CMAKE_Swift_COMPILER_TARGET";
static std::string const kCMAKE_TRY_COMPILE_OSX_ARCHITECTURES =
"CMAKE_TRY_COMPILE_OSX_ARCHITECTURES";
static std::string const kCMAKE_TRY_COMPILE_PLATFORM_VARIABLES =
"CMAKE_TRY_COMPILE_PLATFORM_VARIABLES";
static std::string const kCMAKE_WARN_DEPRECATED = "CMAKE_WARN_DEPRECATED";
/* GHS Multi platform variables */
static std::set<std::string> ghs_platform_vars{
"GHS_TARGET_PLATFORM", "GHS_PRIMARY_TARGET", "GHS_TOOLSET_ROOT",
"GHS_OS_ROOT", "GHS_OS_DIR", "GHS_BSP_NAME",
"GHS_OS_DIR_OPTION"
};
int cmCoreTryCompile::TryCompileCode(std::vector<std::string> const& argv,
bool isTryRun)
{
this->BinaryDirectory = argv[1];
this->OutputFile.clear();
// which signature were we called with ?
this->SrcFileSignature = true;
cmStateEnums::TargetType targetType = cmStateEnums::EXECUTABLE;
const std::string* tt =
this->Makefile->GetDef("CMAKE_TRY_COMPILE_TARGET_TYPE");
if (!isTryRun && tt && !tt->empty()) {
if (*tt == cmState::GetTargetTypeName(cmStateEnums::EXECUTABLE)) {
targetType = cmStateEnums::EXECUTABLE;
} else if (*tt ==
cmState::GetTargetTypeName(cmStateEnums::STATIC_LIBRARY)) {
targetType = cmStateEnums::STATIC_LIBRARY;
} else {
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmStrCat("Invalid value '", *tt,
"' for CMAKE_TRY_COMPILE_TARGET_TYPE. Only '",
cmState::GetTargetTypeName(cmStateEnums::EXECUTABLE),
"' and '",
cmState::GetTargetTypeName(cmStateEnums::STATIC_LIBRARY),
"' are allowed."));
return -1;
}
}
std::string sourceDirectory = argv[2];
std::string projectName;
std::string targetName;
std::vector<std::string> cmakeFlags(1, "CMAKE_FLAGS"); // fake argv[0]
std::vector<std::string> compileDefs;
std::string cmakeInternal;
std::string outputVariable;
std::string copyFile;
std::string copyFileError;
LanguageStandardState cState("C");
LanguageStandardState cudaState("CUDA");
LanguageStandardState cxxState("CXX");
LanguageStandardState objcState("OBJC");
LanguageStandardState objcxxState("OBJCXX");
std::vector<std::string> targets;
std::vector<std::string> linkOptions;
std::string libsToLink = " ";
bool useOldLinkLibs = true;
char targetNameBuf[64];
bool didOutputVariable = false;
bool didCopyFile = false;
bool didCopyFileError = false;
bool useSources = argv[2] == "SOURCES";
std::vector<std::string> sources;
enum Doing
{
DoingNone,
DoingCMakeFlags,
DoingCompileDefinitions,
DoingLinkOptions,
DoingLinkLibraries,
DoingOutputVariable,
DoingCopyFile,
DoingCopyFileError,
DoingSources,
DoingCMakeInternal
};
Doing doing = useSources ? DoingSources : DoingNone;
for (size_t i = 3; i < argv.size(); ++i) {
if (argv[i] == "CMAKE_FLAGS") {
doing = DoingCMakeFlags;
} else if (argv[i] == "COMPILE_DEFINITIONS") {
doing = DoingCompileDefinitions;
} else if (argv[i] == "LINK_OPTIONS") {
doing = DoingLinkOptions;
} else if (argv[i] == "LINK_LIBRARIES") {
doing = DoingLinkLibraries;
useOldLinkLibs = false;
} else if (argv[i] == "OUTPUT_VARIABLE") {
doing = DoingOutputVariable;
didOutputVariable = true;
} else if (argv[i] == "COPY_FILE") {
doing = DoingCopyFile;
didCopyFile = true;
} else if (argv[i] == "COPY_FILE_ERROR") {
doing = DoingCopyFileError;
didCopyFileError = true;
} else if (cState.UpdateIfMatches(argv, i) ||
cxxState.UpdateIfMatches(argv, i) ||
cudaState.UpdateIfMatches(argv, i) ||
objcState.UpdateIfMatches(argv, i) ||
objcxxState.UpdateIfMatches(argv, i)) {
continue;
} else if (argv[i] == "__CMAKE_INTERNAL") {
doing = DoingCMakeInternal;
} else if (doing == DoingCMakeFlags) {
cmakeFlags.push_back(argv[i]);
} else if (doing == DoingCompileDefinitions) {
cmExpandList(argv[i], compileDefs);
} else if (doing == DoingLinkOptions) {
linkOptions.push_back(argv[i]);
} else if (doing == DoingLinkLibraries) {
libsToLink += "\"" + cmTrimWhitespace(argv[i]) + "\" ";
if (cmTarget* tgt = this->Makefile->FindTargetToUse(argv[i])) {
switch (tgt->GetType()) {
case cmStateEnums::SHARED_LIBRARY:
case cmStateEnums::STATIC_LIBRARY:
case cmStateEnums::INTERFACE_LIBRARY:
case cmStateEnums::UNKNOWN_LIBRARY:
break;
case cmStateEnums::EXECUTABLE:
if (tgt->IsExecutableWithExports()) {
break;
}
CM_FALLTHROUGH;
default:
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmStrCat("Only libraries may be used as try_compile or try_run "
"IMPORTED LINK_LIBRARIES. Got ",
tgt->GetName(), " of type ",
cmState::GetTargetTypeName(tgt->GetType()), "."));
return -1;
}
if (tgt->IsImported()) {
targets.push_back(argv[i]);
}
}
} else if (doing == DoingOutputVariable) {
outputVariable = argv[i];
doing = DoingNone;
} else if (doing == DoingCopyFile) {
copyFile = argv[i];
doing = DoingNone;
} else if (doing == DoingCopyFileError) {
copyFileError = argv[i];
doing = DoingNone;
} else if (doing == DoingSources) {
sources.push_back(argv[i]);
} else if (doing == DoingCMakeInternal) {
cmakeInternal = argv[i];
doing = DoingNone;
} else if (i == 3) {
this->SrcFileSignature = false;
projectName = argv[i];
} else if (i == 4 && !this->SrcFileSignature) {
targetName = argv[i];
} else {
std::ostringstream m;
m << "try_compile given unknown argument \"" << argv[i] << "\".";
this->Makefile->IssueMessage(MessageType::AUTHOR_WARNING, m.str());
}
}
if (didCopyFile && copyFile.empty()) {
this->Makefile->IssueMessage(MessageType::FATAL_ERROR,
"COPY_FILE must be followed by a file path");
return -1;
}
if (didCopyFileError && copyFileError.empty()) {
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
"COPY_FILE_ERROR must be followed by a variable name");
return -1;
}
if (didCopyFileError && !didCopyFile) {
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
"COPY_FILE_ERROR may be used only with COPY_FILE");
return -1;
}
if (didOutputVariable && outputVariable.empty()) {
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
"OUTPUT_VARIABLE must be followed by a variable name");
return -1;
}
if (useSources && sources.empty()) {
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
"SOURCES must be followed by at least one source file");
return -1;
}
if (!this->SrcFileSignature) {
if (!cState.Validate(this->Makefile)) {
return -1;
}
if (!cudaState.Validate(this->Makefile)) {
return -1;
}
if (!cxxState.Validate(this->Makefile)) {
return -1;
}
if (!objcState.Validate(this->Makefile)) {
return -1;
}
if (!objcxxState.Validate(this->Makefile)) {
return -1;
}
}
// compute the binary dir when TRY_COMPILE is called with a src file
// signature
if (this->SrcFileSignature) {
this->BinaryDirectory += "/CMakeFiles/CMakeTmp";
} else {
// only valid for srcfile signatures
if (!compileDefs.empty()) {
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
"COMPILE_DEFINITIONS specified on a srcdir type TRY_COMPILE");
return -1;
}
if (!copyFile.empty()) {
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
"COPY_FILE specified on a srcdir type TRY_COMPILE");
return -1;
}
}
// make sure the binary directory exists
cmSystemTools::MakeDirectory(this->BinaryDirectory);
// do not allow recursive try Compiles
if (this->BinaryDirectory == this->Makefile->GetHomeOutputDirectory()) {
std::ostringstream e;
e << "Attempt at a recursive or nested TRY_COMPILE in directory\n"
<< " " << this->BinaryDirectory << "\n";
this->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str());
return -1;
}
std::string outFileName = this->BinaryDirectory + "/CMakeLists.txt";
// which signature are we using? If we are using var srcfile bindir
if (this->SrcFileSignature) {
// remove any CMakeCache.txt files so we will have a clean test
std::string ccFile = this->BinaryDirectory + "/CMakeCache.txt";
cmSystemTools::RemoveFile(ccFile);
// Choose sources.
if (!useSources) {
sources.push_back(argv[2]);
}
// Detect languages to enable.
cmGlobalGenerator* gg = this->Makefile->GetGlobalGenerator();
std::set<std::string> testLangs;
for (std::string const& si : sources) {
std::string ext = cmSystemTools::GetFilenameLastExtension(si);
std::string lang = gg->GetLanguageFromExtension(ext.c_str());
if (!lang.empty()) {
testLangs.insert(lang);
} else {
std::ostringstream err;
err << "Unknown extension \"" << ext << "\" for file\n"
<< " " << si << "\n"
<< "try_compile() works only for enabled languages. "
<< "Currently these are:\n ";
std::vector<std::string> langs;
gg->GetEnabledLanguages(langs);
err << cmJoin(langs, " ");
err << "\nSee project() command to enable other languages.";
this->Makefile->IssueMessage(MessageType::FATAL_ERROR, err.str());
return -1;
}
}
std::string const tcConfig =
this->Makefile->GetSafeDefinition("CMAKE_TRY_COMPILE_CONFIGURATION");
// we need to create a directory and CMakeLists file etc...
// first create the directories
sourceDirectory = this->BinaryDirectory;
// now create a CMakeLists.txt file in that directory
FILE* fout = cmsys::SystemTools::Fopen(outFileName, "w");
if (!fout) {
std::ostringstream e;
/* clang-format off */
e << "Failed to open\n"
<< " " << outFileName << "\n"
<< cmSystemTools::GetLastSystemError();
/* clang-format on */
this->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str());
return -1;
}
const char* def = this->Makefile->GetDefinition("CMAKE_MODULE_PATH");
fprintf(fout, "cmake_minimum_required(VERSION %u.%u.%u.%u)\n",
cmVersion::GetMajorVersion(), cmVersion::GetMinorVersion(),
cmVersion::GetPatchVersion(), cmVersion::GetTweakVersion());
if (def) {
fprintf(fout, "set(CMAKE_MODULE_PATH \"%s\")\n", def);
}
/* Set MSVC runtime library policy to match our selection. */
if (const char* msvcRuntimeLibraryDefault =
this->Makefile->GetDefinition(kCMAKE_MSVC_RUNTIME_LIBRARY_DEFAULT)) {
fprintf(fout, "cmake_policy(SET CMP0091 %s)\n",
*msvcRuntimeLibraryDefault ? "NEW" : "OLD");
}
/* Set CUDA architectures policy to match outer project. */
if (this->Makefile->GetPolicyStatus(cmPolicies::CMP0104) !=
cmPolicies::NEW &&
testLangs.find("CUDA") != testLangs.end() &&
this->Makefile->GetSafeDefinition(kCMAKE_CUDA_ARCHITECTURES).empty()) {
fprintf(fout, "cmake_policy(SET CMP0104 OLD)\n");
}
std::string projectLangs;
for (std::string const& li : testLangs) {
projectLangs += " " + li;
std::string rulesOverrideBase = "CMAKE_USER_MAKE_RULES_OVERRIDE";
std::string rulesOverrideLang = cmStrCat(rulesOverrideBase, "_", li);
if (const char* rulesOverridePath =
this->Makefile->GetDefinition(rulesOverrideLang)) {
fprintf(fout, "set(%s \"%s\")\n", rulesOverrideLang.c_str(),
rulesOverridePath);
} else if (const char* rulesOverridePath2 =
this->Makefile->GetDefinition(rulesOverrideBase)) {
fprintf(fout, "set(%s \"%s\")\n", rulesOverrideBase.c_str(),
rulesOverridePath2);
}
}
fprintf(fout, "project(CMAKE_TRY_COMPILE%s)\n", projectLangs.c_str());
if (cmakeInternal == "ABI") {
// This is the ABI detection step, also used for implicit includes.
// Erase any include_directories() calls from the toolchain file so
// that we do not see them as implicit. Our ABI detection source
// does not include any system headers anyway.
fprintf(fout,
"set_property(DIRECTORY PROPERTY INCLUDE_DIRECTORIES \"\")\n");
}
fprintf(fout, "set(CMAKE_VERBOSE_MAKEFILE 1)\n");
for (std::string const& li : testLangs) {
std::string langFlags = "CMAKE_" + li + "_FLAGS";
const char* flags = this->Makefile->GetDefinition(langFlags);
fprintf(fout, "set(CMAKE_%s_FLAGS %s)\n", li.c_str(),
cmOutputConverter::EscapeForCMake(flags ? flags : "").c_str());
fprintf(fout,
"set(CMAKE_%s_FLAGS \"${CMAKE_%s_FLAGS}"
" ${COMPILE_DEFINITIONS}\")\n",
li.c_str(), li.c_str());
}
switch (this->Makefile->GetPolicyStatus(cmPolicies::CMP0066)) {
case cmPolicies::WARN:
if (this->Makefile->PolicyOptionalWarningEnabled(
"CMAKE_POLICY_WARNING_CMP0066")) {
std::ostringstream w;
/* clang-format off */
w << cmPolicies::GetPolicyWarning(cmPolicies::CMP0066) << "\n"
"For compatibility with older versions of CMake, try_compile "
"is not honoring caller config-specific compiler flags "
"(e.g. CMAKE_C_FLAGS_DEBUG) in the test project."
;
/* clang-format on */
this->Makefile->IssueMessage(MessageType::AUTHOR_WARNING, w.str());
}
case cmPolicies::OLD:
// OLD behavior is to do nothing.
break;
case cmPolicies::REQUIRED_IF_USED:
case cmPolicies::REQUIRED_ALWAYS:
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmPolicies::GetRequiredPolicyError(cmPolicies::CMP0066));
CM_FALLTHROUGH;
case cmPolicies::NEW: {
// NEW behavior is to pass config-specific compiler flags.
static std::string const cfgDefault = "DEBUG";
std::string const cfg =
!tcConfig.empty() ? cmSystemTools::UpperCase(tcConfig) : cfgDefault;
for (std::string const& li : testLangs) {
std::string const langFlagsCfg =
cmStrCat("CMAKE_", li, "_FLAGS_", cfg);
const char* flagsCfg = this->Makefile->GetDefinition(langFlagsCfg);
fprintf(fout, "set(%s %s)\n", langFlagsCfg.c_str(),
cmOutputConverter::EscapeForCMake(flagsCfg ? flagsCfg : "")
.c_str());
}
} break;
}
switch (this->Makefile->GetPolicyStatus(cmPolicies::CMP0056)) {
case cmPolicies::WARN:
if (this->Makefile->PolicyOptionalWarningEnabled(
"CMAKE_POLICY_WARNING_CMP0056")) {
std::ostringstream w;
/* clang-format off */
w << cmPolicies::GetPolicyWarning(cmPolicies::CMP0056) << "\n"
"For compatibility with older versions of CMake, try_compile "
"is not honoring caller link flags (e.g. CMAKE_EXE_LINKER_FLAGS) "
"in the test project."
;
/* clang-format on */
this->Makefile->IssueMessage(MessageType::AUTHOR_WARNING, w.str());
}
case cmPolicies::OLD:
// OLD behavior is to do nothing.
break;
case cmPolicies::REQUIRED_IF_USED:
case cmPolicies::REQUIRED_ALWAYS:
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmPolicies::GetRequiredPolicyError(cmPolicies::CMP0056));
CM_FALLTHROUGH;
case cmPolicies::NEW:
// NEW behavior is to pass linker flags.
{
const char* exeLinkFlags =
this->Makefile->GetDefinition("CMAKE_EXE_LINKER_FLAGS");
fprintf(
fout, "set(CMAKE_EXE_LINKER_FLAGS %s)\n",
cmOutputConverter::EscapeForCMake(exeLinkFlags ? exeLinkFlags : "")
.c_str());
}
break;
}
fprintf(fout,
"set(CMAKE_EXE_LINKER_FLAGS \"${CMAKE_EXE_LINKER_FLAGS}"
" ${EXE_LINKER_FLAGS}\")\n");
fprintf(fout, "include_directories(${INCLUDE_DIRECTORIES})\n");
fprintf(fout, "set(CMAKE_SUPPRESS_REGENERATION 1)\n");
fprintf(fout, "link_directories(${LINK_DIRECTORIES})\n");
// handle any compile flags we need to pass on
if (!compileDefs.empty()) {
// Pass using bracket arguments to preserve content.
fprintf(fout, "add_definitions([==[%s]==])\n",
cmJoin(compileDefs, "]==] [==[").c_str());
}
/* Use a random file name to avoid rapid creation and deletion
of the same executable name (some filesystems fail on that). */
sprintf(targetNameBuf, "cmTC_%05x", cmSystemTools::RandomSeed() & 0xFFFFF);
targetName = targetNameBuf;
if (!targets.empty()) {
std::string fname = "/" + std::string(targetName) + "Targets.cmake";
cmExportTryCompileFileGenerator tcfg(gg, targets, this->Makefile,
testLangs);
tcfg.SetExportFile((this->BinaryDirectory + fname).c_str());
tcfg.SetConfig(tcConfig);
if (!tcfg.GenerateImportFile()) {
this->Makefile->IssueMessage(MessageType::FATAL_ERROR,
"could not write export file.");
fclose(fout);
return -1;
}
fprintf(fout, "\ninclude(\"${CMAKE_CURRENT_LIST_DIR}/%s\")\n\n",
fname.c_str());
}
// Forward a set of variables to the inner project cache.
{
std::set<std::string> vars;
vars.insert(kCMAKE_C_COMPILER_EXTERNAL_TOOLCHAIN);
vars.insert(kCMAKE_C_COMPILER_TARGET);
vars.insert(kCMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN);
vars.insert(kCMAKE_CXX_COMPILER_TARGET);
vars.insert(kCMAKE_CUDA_ARCHITECTURES);
vars.insert(kCMAKE_CUDA_COMPILER_TARGET);
vars.insert(kCMAKE_CUDA_RUNTIME_LIBRARY);
vars.insert(kCMAKE_ENABLE_EXPORTS);
vars.insert(kCMAKE_LINK_SEARCH_END_STATIC);
vars.insert(kCMAKE_LINK_SEARCH_START_STATIC);
vars.insert(kCMAKE_OSX_ARCHITECTURES);
vars.insert(kCMAKE_OSX_DEPLOYMENT_TARGET);
vars.insert(kCMAKE_OSX_SYSROOT);
vars.insert(kCMAKE_APPLE_ARCH_SYSROOTS);
vars.insert(kCMAKE_POSITION_INDEPENDENT_CODE);
vars.insert(kCMAKE_SYSROOT);
vars.insert(kCMAKE_SYSROOT_COMPILE);
vars.insert(kCMAKE_SYSROOT_LINK);
vars.insert(kCMAKE_Swift_COMPILER_TARGET);
vars.insert(kCMAKE_WARN_DEPRECATED);
vars.emplace("CMAKE_MSVC_RUNTIME_LIBRARY"_s);
if (const char* varListStr = this->Makefile->GetDefinition(
kCMAKE_TRY_COMPILE_PLATFORM_VARIABLES)) {
std::vector<std::string> varList = cmExpandedList(varListStr);
vars.insert(varList.begin(), varList.end());
}
if (this->Makefile->GetPolicyStatus(cmPolicies::CMP0083) ==
cmPolicies::NEW) {
// To ensure full support of PIE, propagate cache variables
// driving the link options
vars.insert(kCMAKE_C_LINK_PIE_SUPPORTED);
vars.insert(kCMAKE_C_LINK_NO_PIE_SUPPORTED);
vars.insert(kCMAKE_CXX_LINK_PIE_SUPPORTED);
vars.insert(kCMAKE_CXX_LINK_NO_PIE_SUPPORTED);
}
/* for the TRY_COMPILEs we want to be able to specify the architecture.
So the user can set CMAKE_OSX_ARCHITECTURES to i386;ppc and then set
CMAKE_TRY_COMPILE_OSX_ARCHITECTURES first to i386 and then to ppc to
have the tests run for each specific architecture. Since
cmLocalGenerator doesn't allow building for "the other"
architecture only via CMAKE_OSX_ARCHITECTURES.
*/
if (const char* tcArchs = this->Makefile->GetDefinition(
kCMAKE_TRY_COMPILE_OSX_ARCHITECTURES)) {
vars.erase(kCMAKE_OSX_ARCHITECTURES);
std::string flag = "-DCMAKE_OSX_ARCHITECTURES=" + std::string(tcArchs);
cmakeFlags.push_back(std::move(flag));
}
for (std::string const& var : vars) {
if (const char* val = this->Makefile->GetDefinition(var)) {
std::string flag = "-D" + var + "=" + val;
cmakeFlags.push_back(std::move(flag));
}
}
}
/* Set the appropriate policy information for ENABLE_EXPORTS */
fprintf(fout, "cmake_policy(SET CMP0065 %s)\n",
this->Makefile->GetPolicyStatus(cmPolicies::CMP0065) ==
cmPolicies::NEW
? "NEW"
: "OLD");
/* Set the appropriate policy information for PIE link flags */
fprintf(fout, "cmake_policy(SET CMP0083 %s)\n",
this->Makefile->GetPolicyStatus(cmPolicies::CMP0083) ==
cmPolicies::NEW
? "NEW"
: "OLD");
if (targetType == cmStateEnums::EXECUTABLE) {
/* Put the executable at a known location (for COPY_FILE). */
fprintf(fout, "set(CMAKE_RUNTIME_OUTPUT_DIRECTORY \"%s\")\n",
this->BinaryDirectory.c_str());
/* Create the actual executable. */
fprintf(fout, "add_executable(%s", targetName.c_str());
} else // if (targetType == cmStateEnums::STATIC_LIBRARY)
{
/* Put the static library at a known location (for COPY_FILE). */
fprintf(fout, "set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY \"%s\")\n",
this->BinaryDirectory.c_str());
/* Create the actual static library. */
fprintf(fout, "add_library(%s STATIC", targetName.c_str());
}
for (std::string const& si : sources) {
fprintf(fout, " \"%s\"", si.c_str());
// Add dependencies on any non-temporary sources.
if (si.find("CMakeTmp") == std::string::npos) {
this->Makefile->AddCMakeDependFile(si);
}
}
fprintf(fout, ")\n");
cState.Enabled(testLangs.find("C") != testLangs.end());
cxxState.Enabled(testLangs.find("CXX") != testLangs.end());
cudaState.Enabled(testLangs.find("CUDA") != testLangs.end());
objcState.Enabled(testLangs.find("OBJC") != testLangs.end());
objcxxState.Enabled(testLangs.find("OBJCXX") != testLangs.end());
bool warnCMP0067 = false;
bool honorStandard = true;
if (cState.DidNone() && cxxState.DidNone() && objcState.DidNone() &&
objcxxState.DidNone() && cudaState.DidNone()) {
switch (this->Makefile->GetPolicyStatus(cmPolicies::CMP0067)) {
case cmPolicies::WARN:
warnCMP0067 = this->Makefile->PolicyOptionalWarningEnabled(
"CMAKE_POLICY_WARNING_CMP0067");
CM_FALLTHROUGH;
case cmPolicies::OLD:
// OLD behavior is to not honor the language standard variables.
honorStandard = false;
break;
case cmPolicies::REQUIRED_IF_USED:
case cmPolicies::REQUIRED_ALWAYS:
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmPolicies::GetRequiredPolicyError(cmPolicies::CMP0067));
case cmPolicies::NEW:
// NEW behavior is to honor the language standard variables.
// We already initialized honorStandard to true.
break;
}
}
std::vector<std::string> warnCMP0067Variables;
cState.LoadUnsetPropertyValues(this->Makefile, honorStandard, warnCMP0067,
warnCMP0067Variables);
cxxState.LoadUnsetPropertyValues(this->Makefile, honorStandard,
warnCMP0067, warnCMP0067Variables);
cudaState.LoadUnsetPropertyValues(this->Makefile, honorStandard,
warnCMP0067, warnCMP0067Variables);
objcState.LoadUnsetPropertyValues(this->Makefile, honorStandard,
warnCMP0067, warnCMP0067Variables);
objcxxState.LoadUnsetPropertyValues(this->Makefile, honorStandard,
warnCMP0067, warnCMP0067Variables);
if (!warnCMP0067Variables.empty()) {
std::ostringstream w;
/* clang-format off */
w << cmPolicies::GetPolicyWarning(cmPolicies::CMP0067) << "\n"
"For compatibility with older versions of CMake, try_compile "
"is not honoring language standard variables in the test project:\n"
;
/* clang-format on */
for (std::string const& vi : warnCMP0067Variables) {
w << " " << vi << "\n";
}
this->Makefile->IssueMessage(MessageType::AUTHOR_WARNING, w.str());
}
cState.WriteProperties(fout, targetName);
cxxState.WriteProperties(fout, targetName);
cudaState.WriteProperties(fout, targetName);
objcState.WriteProperties(fout, targetName);
objcxxState.WriteProperties(fout, targetName);
if (!linkOptions.empty()) {
std::vector<std::string> options;
options.reserve(linkOptions.size());
for (const auto& option : linkOptions) {
options.emplace_back(cmOutputConverter::EscapeForCMake(option));
}
if (targetType == cmStateEnums::STATIC_LIBRARY) {
fprintf(fout,
"set_property(TARGET %s PROPERTY STATIC_LIBRARY_OPTIONS %s)\n",
targetName.c_str(), cmJoin(options, " ").c_str());
} else {
fprintf(fout, "target_link_options(%s PRIVATE %s)\n",
targetName.c_str(), cmJoin(options, " ").c_str());
}
}
if (useOldLinkLibs) {
fprintf(fout, "target_link_libraries(%s ${LINK_LIBRARIES})\n",
targetName.c_str());
} else {
fprintf(fout, "target_link_libraries(%s %s)\n", targetName.c_str(),
libsToLink.c_str());
}
fclose(fout);
projectName = "CMAKE_TRY_COMPILE";
}
if (this->Makefile->GetState()->UseGhsMultiIDE()) {
// Forward the GHS variables to the inner project cache.
for (std::string const& var : ghs_platform_vars) {
if (const char* val = this->Makefile->GetDefinition(var)) {
std::string flag = "-D" + var + "=" + "'" + val + "'";
cmakeFlags.push_back(std::move(flag));
}
}
}
bool erroroc = cmSystemTools::GetErrorOccuredFlag();
cmSystemTools::ResetErrorOccuredFlag();
std::string output;
// actually do the try compile now that everything is setup
int res = this->Makefile->TryCompile(
sourceDirectory, this->BinaryDirectory, projectName, targetName,
this->SrcFileSignature, cmake::NO_BUILD_PARALLEL_LEVEL, &cmakeFlags,
output);
if (erroroc) {
cmSystemTools::SetErrorOccured();
}
// set the result var to the return value to indicate success or failure
this->Makefile->AddCacheDefinition(argv[0], (res == 0 ? "TRUE" : "FALSE"),
"Result of TRY_COMPILE",
cmStateEnums::INTERNAL);
if (!outputVariable.empty()) {
this->Makefile->AddDefinition(outputVariable, output);
}
if (this->SrcFileSignature) {
std::string copyFileErrorMessage;
this->FindOutputFile(targetName, targetType);
if ((res == 0) && !copyFile.empty()) {
if (this->OutputFile.empty() ||
!cmSystemTools::CopyFileAlways(this->OutputFile, copyFile)) {
std::ostringstream emsg;
/* clang-format off */
emsg << "Cannot copy output executable\n"
<< " '" << this->OutputFile << "'\n"
<< "to destination specified by COPY_FILE:\n"
<< " '" << copyFile << "'\n";
/* clang-format on */
if (!this->FindErrorMessage.empty()) {
emsg << this->FindErrorMessage;
}
if (copyFileError.empty()) {
this->Makefile->IssueMessage(MessageType::FATAL_ERROR, emsg.str());
return -1;
}
copyFileErrorMessage = emsg.str();
}
}
if (!copyFileError.empty()) {
this->Makefile->AddDefinition(copyFileError, copyFileErrorMessage);
}
}
return res;
}
void cmCoreTryCompile::CleanupFiles(std::string const& binDir)
{
if (binDir.empty()) {
return;
}
if (binDir.find("CMakeTmp") == std::string::npos) {
cmSystemTools::Error(
"TRY_COMPILE attempt to remove -rf directory that does not contain "
"CMakeTmp:" +
binDir);
return;
}
cmsys::Directory dir;
dir.Load(binDir);
std::set<std::string> deletedFiles;
for (unsigned long i = 0; i < dir.GetNumberOfFiles(); ++i) {
const char* fileName = dir.GetFile(i);
if (strcmp(fileName, ".") != 0 && strcmp(fileName, "..") != 0) {
if (deletedFiles.insert(fileName).second) {
std::string const fullPath =
std::string(binDir).append("/").append(fileName);
if (cmSystemTools::FileIsSymlink(fullPath)) {
cmSystemTools::RemoveFile(fullPath);
} else if (cmSystemTools::FileIsDirectory(fullPath)) {
this->CleanupFiles(fullPath);
cmSystemTools::RemoveADirectory(fullPath);
} else {
#ifdef _WIN32
// Sometimes anti-virus software hangs on to new files so we
// cannot delete them immediately. Try a few times.
cmSystemTools::WindowsFileRetry retry =
cmSystemTools::GetWindowsFileRetry();
while (!cmSystemTools::RemoveFile(fullPath) && --retry.Count &&
cmSystemTools::FileExists(fullPath)) {
cmSystemTools::Delay(retry.Delay);
}
if (retry.Count == 0)
#else
if (!cmSystemTools::RemoveFile(fullPath))
#endif
{
std::string m = "Remove failed on file: " + fullPath;
cmSystemTools::ReportLastSystemError(m.c_str());
}
}
}
}
}
}
void cmCoreTryCompile::FindOutputFile(const std::string& targetName,
cmStateEnums::TargetType targetType)
{
this->FindErrorMessage.clear();
this->OutputFile.clear();
std::string tmpOutputFile = "/";
if (targetType == cmStateEnums::EXECUTABLE) {
tmpOutputFile += targetName;
tmpOutputFile +=
this->Makefile->GetSafeDefinition("CMAKE_EXECUTABLE_SUFFIX");
} else // if (targetType == cmStateEnums::STATIC_LIBRARY)
{
tmpOutputFile +=
this->Makefile->GetSafeDefinition("CMAKE_STATIC_LIBRARY_PREFIX");
tmpOutputFile += targetName;
tmpOutputFile +=
this->Makefile->GetSafeDefinition("CMAKE_STATIC_LIBRARY_SUFFIX");
}
// a list of directories where to search for the compilation result
// at first directly in the binary dir
std::vector<std::string> searchDirs;
searchDirs.emplace_back();
const char* config =
this->Makefile->GetDefinition("CMAKE_TRY_COMPILE_CONFIGURATION");
// if a config was specified try that first
if (config && config[0]) {
std::string tmp = cmStrCat('/', config);
searchDirs.push_back(std::move(tmp));
}
searchDirs.emplace_back("/Debug");
#if defined(__APPLE__)
std::string app = "/" + targetName + ".app";
if (config && config[0]) {
std::string tmp = cmStrCat('/', config, app);
searchDirs.push_back(std::move(tmp));
}
std::string tmp = "/Debug" + app;
searchDirs.emplace_back(std::move(tmp));
searchDirs.push_back(std::move(app));
#endif
searchDirs.emplace_back("/Development");
for (std::string const& sdir : searchDirs) {
std::string command = cmStrCat(this->BinaryDirectory, sdir, tmpOutputFile);
if (cmSystemTools::FileExists(command)) {
this->OutputFile = cmSystemTools::CollapseFullPath(command);
return;
}
}
std::ostringstream emsg;
emsg << "Unable to find the executable at any of:\n";
emsg << cmWrap(" " + this->BinaryDirectory, searchDirs, tmpOutputFile, "\n")
<< "\n";
this->FindErrorMessage = emsg.str();
}
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