Can"t find PCH file during build. #24
Comments
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I think I"m getting the same thing with the example CMakeLists.txt from the readme. macOS 10.13, cmake version 3.12.2, ninja 1.8.2. For me what happens is the first time I run The makefile generator works for me; it builds the prefix.h target first and succeeds on the first try. Running it again succeeds: |
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Last time I tried srcdir != builddir was not supported. |
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Hm, I tried |
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I also stumbled across this issue. Problem is that the diff --git a/CMakePCHCompiler.cmake b/CMakePCHCompiler.cmake
index 525a836e..b04181db 100644
--- a/CMakePCHCompiler.cmake
+++ b/CMakePCHCompiler.cmake
@@ -118,6 +118,7 @@ function(target_precompiled_header) # target [...] header
)
target_sources(${target} PRIVATE $<TARGET_OBJECTS:${pch_target}>)
else()
+ string(REPLACE ".." "__" header "${header}")
set(exclude -include ${target_dir}/${header})
endif()
target_compile_options(${target} PRIVATE ${exclude}) |
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@themiwi Okay, so long story short - if I understand correctly - currently we cannot use PCH header path containing Does CMake indeed translates |
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Isn"t that what my patch is doing? 🤔 |
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@themiwi I was referring your statement:
And I was asking if it is really CMake behavior? But I found the evidence myself there in CMake"s And btw. it was NOT that trivial as you have suggested, as CMake does far more than |
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Thanks, that"s as I suspected originally. With CMake there"s usually more to it 😉 |
I am testing this module out with our software but I can"t get it to compile. After calling add_library(), I call target_precompiled_header(${target} ${pch_path}) to add the PCH to it. CMake will run successfully if I use the absolute or relative path to the .pch file but when I try to compile the code I get one of the following errors:
(relative path)
cc1plus: fatal error: /home/smcmich1/repo/visionworkbench/build/src/vw/Core/CMakeFiles/VwCore.pch.dir/../stdafx.h: No such file or directory
(absolute path)
cc1plus: fatal error: /home/smcmich1/repo/visionworkbench/build/src/vw/Core/CMakeFiles/VwCore.pch.dir//home/smcmich1/repo/visionworkbench/src/vw/stdafx.h: No such file or directory
Do you know what could be going wrong? The PCH file is located at /home/smcmich1/repo/visionworkbench/src/vw/stdafx.h. CMake is being called from the "build" subfolder and the code is located in the "src" subfolder. The project line is:
project (VisionWorkbench C CXX CXXPCH CPCH)
This is on Red Hat 6, with CMake 3.5.2, and GCC 4.9.3.
Thanks,
Scott
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