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Set -std=gnu99 for gcc on all architectures #399

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Set -std=gnu99 for gcc on all architectures #399

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7 changes: 5 additions & 2 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -207,6 +207,11 @@ if(APPLE)
set(CMAKE_MACOSX_RPATH TRUE)
endif()

if(CMAKE_C_COMPILER_ID STREQUAL GNU)
# We need C99 (GNU99 more exactly)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99")
endif()

# Based on the target system's processor and the compiler being used,
# set build variables indicating which hardware features can be targeted
# by the compiler. Note we DO NOT check which hardware features are supported
Expand All @@ -215,8 +220,6 @@ endif()
message(STATUS "Building for system processor ${CMAKE_SYSTEM_PROCESSOR}")
if(CMAKE_SYSTEM_PROCESSOR MATCHES "(i386|i686|x86_64|amd64|AMD64)")
if(CMAKE_C_COMPILER_ID STREQUAL GNU)
# We need C99 (GNU99 more exactly)
SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99")
set(COMPILER_SUPPORT_SSE2 TRUE)
if(CMAKE_C_COMPILER_VERSION VERSION_GREATER 4.7 OR CMAKE_C_COMPILER_VERSION VERSION_EQUAL 4.7)
set(COMPILER_SUPPORT_AVX2 TRUE)
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