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Diffstat (limited to '')
| -rw-r--r-- | libevent/cmake/CheckConstExists.cmake | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/libevent/cmake/CheckConstExists.cmake b/libevent/cmake/CheckConstExists.cmake new file mode 100644 index 0000000..de07458 --- /dev/null +++ b/libevent/cmake/CheckConstExists.cmake @@ -0,0 +1,25 @@ +include(CheckCSourceCompiles) + +macro(check_const_exists CONST FILES VARIABLE) + if (NOT DEFINED ${VARIABLE}) + set(check_const_exists_source "") + foreach(file ${FILES}) + set(check_const_exists_source + "${check_const_exists_source} + #include <${file}>") + endforeach() + set(check_const_exists_source + "${check_const_exists_source} + int main() { (void)${CONST}; return 0; }") + + check_c_source_compiles("${check_const_exists_source}" ${VARIABLE}) + + if (${${VARIABLE}}) + set(${VARIABLE} 1 CACHE INTERNAL "Have const ${CONST}") + message(STATUS "Looking for ${CONST} - found") + else() + set(${VARIABLE} 0 CACHE INTERNAL "Have const ${CONST}") + message(STATUS "Looking for ${CONST} - not found") + endif() + endif() +endmacro(check_const_exists) |