Generator expression evaluates WIN32 variable to true even not on Windows
I work on Ubuntu, and here is a part of my CMake code (the questionable part is in the last sentence):
include(ExternalProject)
ExternalProject_Add(fftw3_external
URL
http://www.fftw.org/fftw-3.3.8.tar.gz
URL_HASH
MD5=8aac833c943d8e90d51b697b27d4384d
DOWNLOAD_NO_PROGRESS
1
UPDATE_COMMAND
""
LOG_CONFIGURE
1
LOG_BUILD
1
LOG_INSTALL
1
CMAKE_ARGS
-DCMAKE_INSTALL_PREFIX=${STAGED_INSTALL_PREFIX}
-DBUILD_TESTS=OFF
CMAKE_CACHE_ARGS
-DCMAKE_C_FLAGS:STRING=$<$<BOOL:WIN32>:-DWITH_OUR_MALLOC>
)
After configuration I look inside the corresponding cache file, fftw3_external-cache.cmake, and it shows:
set(CMAKE_C_FLAGS "-DWITH_OUR_MALLOC" CACHE STRING "Initial cache" FORCE)
But this content corresponds to WIN32 being true. Why it is so?
cmake
edited Nov 22 '18 at 9:56
Tsyvarev
26.2k42661
asked Nov 22 '18 at 6:48
AfterbunnyAfterbunny
311
add a comment |
I work on Ubuntu, and here is a part of my CMake code (the questionable part is in the last sentence):
include(ExternalProject)
ExternalProject_Add(fftw3_external
URL
http://www.fftw.org/fftw-3.3.8.tar.gz
URL_HASH
MD5=8aac833c943d8e90d51b697b27d4384d
DOWNLOAD_NO_PROGRESS
1
UPDATE_COMMAND
""
LOG_CONFIGURE
1
LOG_BUILD
1
LOG_INSTALL
1
CMAKE_ARGS
-DCMAKE_INSTALL_PREFIX=${STAGED_INSTALL_PREFIX}
-DBUILD_TESTS=OFF
CMAKE_CACHE_ARGS
-DCMAKE_C_FLAGS:STRING=$<$<BOOL:WIN32>:-DWITH_OUR_MALLOC>
)
After configuration I look inside the corresponding cache file, fftw3_external-cache.cmake, and it shows:
set(CMAKE_C_FLAGS "-DWITH_OUR_MALLOC" CACHE STRING "Initial cache" FORCE)
But this content corresponds to WIN32 being true. Why it is so?
cmake
edited Nov 22 '18 at 9:56
Tsyvarev
26.2k42661
asked Nov 22 '18 at 6:48
AfterbunnyAfterbunny
311
add a comment |
I work on Ubuntu, and here is a part of my CMake code (the questionable part is in the last sentence):
include(ExternalProject)
ExternalProject_Add(fftw3_external
URL
http://www.fftw.org/fftw-3.3.8.tar.gz
URL_HASH
MD5=8aac833c943d8e90d51b697b27d4384d
DOWNLOAD_NO_PROGRESS
1
UPDATE_COMMAND
""
LOG_CONFIGURE
1
LOG_BUILD
1
LOG_INSTALL
1
CMAKE_ARGS
-DCMAKE_INSTALL_PREFIX=${STAGED_INSTALL_PREFIX}
-DBUILD_TESTS=OFF
CMAKE_CACHE_ARGS
-DCMAKE_C_FLAGS:STRING=$<$<BOOL:WIN32>:-DWITH_OUR_MALLOC>
)
After configuration I look inside the corresponding cache file, fftw3_external-cache.cmake, and it shows:
set(CMAKE_C_FLAGS "-DWITH_OUR_MALLOC" CACHE STRING "Initial cache" FORCE)
But this content corresponds to WIN32 being true. Why it is so?
cmake
edited Nov 22 '18 at 9:56
Tsyvarev
26.2k42661
asked Nov 22 '18 at 6:48
AfterbunnyAfterbunny
311
I work on Ubuntu, and here is a part of my CMake code (the questionable part is in the last sentence):
include(ExternalProject)
ExternalProject_Add(fftw3_external
URL
http://www.fftw.org/fftw-3.3.8.tar.gz
URL_HASH
MD5=8aac833c943d8e90d51b697b27d4384d
DOWNLOAD_NO_PROGRESS
1
UPDATE_COMMAND
""
LOG_CONFIGURE
1
LOG_BUILD
1
LOG_INSTALL
1
CMAKE_ARGS
-DCMAKE_INSTALL_PREFIX=${STAGED_INSTALL_PREFIX}
-DBUILD_TESTS=OFF
CMAKE_CACHE_ARGS
-DCMAKE_C_FLAGS:STRING=$<$<BOOL:WIN32>:-DWITH_OUR_MALLOC>
)
After configuration I look inside the corresponding cache file, fftw3_external-cache.cmake, and it shows:
set(CMAKE_C_FLAGS "-DWITH_OUR_MALLOC" CACHE STRING "Initial cache" FORCE)
But this content corresponds to WIN32 being true. Why it is so?
cmake
cmake
edited Nov 22 '18 at 9:56
Tsyvarev
26.2k42661
asked Nov 22 '18 at 6:48
AfterbunnyAfterbunny
311
edited Nov 22 '18 at 9:56
Tsyvarev
26.2k42661
asked Nov 22 '18 at 6:48
AfterbunnyAfterbunny
311
edited Nov 22 '18 at 9:56
Tsyvarev
26.2k42661
edited Nov 22 '18 at 9:56
Tsyvarev
26.2k42661
edited Nov 22 '18 at 9:56
Tsyvarev
26.2k42661
26.2k42661
asked Nov 22 '18 at 6:48
AfterbunnyAfterbunny
311
asked Nov 22 '18 at 6:48
AfterbunnyAfterbunny
311
asked Nov 22 '18 at 6:48
AfterbunnyAfterbunny
311
311
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
In the generator expression
$<BOOL:WIN32>
CMake evaluates "WIN32" as a string, not as a variable. Because this string doesn't correspond to any false pattern, it is evaluated as TRUE.
You need to dereference the variable for check its value:
$<BOOL:${WIN32}>
answered Nov 22 '18 at 7:32
TsyvarevTsyvarev
26.2k42661
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
In the generator expression
$<BOOL:WIN32>
CMake evaluates "WIN32" as a string, not as a variable. Because this string doesn't correspond to any false pattern, it is evaluated as TRUE.
You need to dereference the variable for check its value:
$<BOOL:${WIN32}>
answered Nov 22 '18 at 7:32
TsyvarevTsyvarev
26.2k42661
add a comment |
In the generator expression
$<BOOL:WIN32>
CMake evaluates "WIN32" as a string, not as a variable. Because this string doesn't correspond to any false pattern, it is evaluated as TRUE.
You need to dereference the variable for check its value:
$<BOOL:${WIN32}>
answered Nov 22 '18 at 7:32
TsyvarevTsyvarev
26.2k42661
add a comment |
In the generator expression
$<BOOL:WIN32>
CMake evaluates "WIN32" as a string, not as a variable. Because this string doesn't correspond to any false pattern, it is evaluated as TRUE.
You need to dereference the variable for check its value:
$<BOOL:${WIN32}>
answered Nov 22 '18 at 7:32
TsyvarevTsyvarev
26.2k42661
In the generator expression
$<BOOL:WIN32>
CMake evaluates "WIN32" as a string, not as a variable. Because this string doesn't correspond to any false pattern, it is evaluated as TRUE.
You need to dereference the variable for check its value:
$<BOOL:${WIN32}>
answered Nov 22 '18 at 7:32
TsyvarevTsyvarev
26.2k42661
answered Nov 22 '18 at 7:32
TsyvarevTsyvarev
26.2k42661
answered Nov 22 '18 at 7:32
TsyvarevTsyvarev
26.2k42661
answered Nov 22 '18 at 7:32
TsyvarevTsyvarev
26.2k42661
26.2k42661
add a comment |
add a comment |
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