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Makefiles: Fix "make depend" with add_custom_command DEPFILE

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Since commit cfd8a5ac1f (Makefiles: Add support of DEPFILE for
add_custom_command, 2020-12-04, v3.20.0-rc1~237^2~1) we store in
`CMAKE_DEPENDS_DEPENDENCY_FILES` an empty string as the source file with
which the dependencies of a custom command depfile are associated. When
this list is later expanded by `make depend`, the empty element is
removed and breaks list indexing.  Fix the list expansion to preserve
empty elements.
This commit is contained in:
Brad King
2022-02-28 09:41:53 -05:00
parent 0883ab385a
commit 55db2cf1e5
1 changed files with 1 additions and 1 deletions
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Source/cmLocalUnixMakefileGenerator3.cxx
+1 -1
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@@ -1849,7 +1849,7 @@ void cmLocalUnixMakefileGenerator3::ClearDependencies(cmMakefile* mf,
cmSystemTools::Touch(DepTimestamp.GenericString(), true); cmSystemTools::Touch(DepTimestamp.GenericString(), true);
// clear the dependencies files generated by the compiler // clear the dependencies files generated by the compiler
std::vector<std::string> dependencies = cmExpandedList(depsFiles); std::vector<std::string> dependencies = cmExpandedList(depsFiles, true);
cmDependsCompiler depsManager; cmDependsCompiler depsManager;
depsManager.SetVerbose(verbose); depsManager.SetVerbose(verbose);
depsManager.ClearDependencies(dependencies); depsManager.ClearDependencies(dependencies);