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bug #914: fix compiler detection on windows

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(grafted from 77af14fb62
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This commit is contained in:
Gael Guennebaud 2015-02-16 16:26:47 +01:00
parent 953d5ccfd5
commit 4dded73227
1 changed files with 10 additions and 3 deletions
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13
cmake/EigenTesting.cmake
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@ -359,22 +359,29 @@ macro(ei_get_compilerver VAR)
endif()
else()
# on all other system we rely on ${CMAKE_CXX_COMPILER}
# supporting a "--version" flag
# supporting a "--version" or "/version" flag
if(WIN32 AND NOT CYGWIN)
set(EIGEN_CXX_FLAG_VERSION "/version")
else()
set(EIGEN_CXX_FLAG_VERSION "--version")
endif()
# check whether the head command exists
find_program(HEAD_EXE head NO_CMAKE_ENVIRONMENT_PATH NO_CMAKE_PATH NO_CMAKE_SYSTEM_PATH)
if(HEAD_EXE)
execute_process(COMMAND ${CMAKE_CXX_COMPILER} --version
execute_process(COMMAND ${CMAKE_CXX_COMPILER} ${EIGEN_CXX_FLAG_VERSION}
COMMAND head -n 1
OUTPUT_VARIABLE eigen_cxx_compiler_version_string OUTPUT_STRIP_TRAILING_WHITESPACE)
else()
execute_process(COMMAND ${CMAKE_CXX_COMPILER} --version
execute_process(COMMAND ${CMAKE_CXX_COMPILER} ${EIGEN_CXX_FLAG_VERSION}
OUTPUT_VARIABLE eigen_cxx_compiler_version_string OUTPUT_STRIP_TRAILING_WHITESPACE)
string(REGEX REPLACE "[\n\r].*" "" eigen_cxx_compiler_version_string ${eigen_cxx_compiler_version_string})
endif()
ei_get_compilerver_from_cxx_version_string("${eigen_cxx_compiler_version_string}" CNAME CVER)
set(${VAR} "${CNAME}-${CVER}")
endif()
endmacro(ei_get_compilerver)