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Prevent re-execution of slow feature tests.

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This commit is contained in:
Eric Fiselier 2016-05-23 20:51:15 -06:00
parent c7108df977
commit 9fcdd6fc25
1 changed files with 4 additions and 1 deletions
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5
cmake/CXXFeatureCheck.cmake
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@ -21,12 +21,15 @@ function(cxx_feature_check FILE)
string(TOLOWER ${FILE} FILE) string(TOLOWER ${FILE} FILE)
string(TOUPPER ${FILE} VAR) string(TOUPPER ${FILE} VAR)
string(TOUPPER "HAVE_${VAR}" FEATURE) string(TOUPPER "HAVE_${VAR}" FEATURE)
if (DEFINED HAVE_${VAR})
return()
endif()
message("-- Performing Test ${FEATURE}") message("-- Performing Test ${FEATURE}")
try_run(RUN_${FEATURE} COMPILE_${FEATURE} try_run(RUN_${FEATURE} COMPILE_${FEATURE}
${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp) ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp)
if(RUN_${FEATURE} EQUAL 0) if(RUN_${FEATURE} EQUAL 0)
message("-- Performing Test ${FEATURE} -- success") message("-- Performing Test ${FEATURE} -- success")
set(HAVE_${VAR} 1 PARENT_SCOPE) set(HAVE_${VAR} 1 CACHE INTERNAL "Feature test for ${FILE}" PARENT_SCOPE)
add_definitions(-DHAVE_${VAR}) add_definitions(-DHAVE_${VAR})
else() else()
if(NOT COMPILE_${FEATURE}) if(NOT COMPILE_${FEATURE})