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Optionally use fixed osgDB build for linking

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This allows us to drop the /FORCE:MULTIPLE work-around.
This commit is contained in:
James Turner 2016-08-16 12:59:52 +01:00
parent db825d3119
commit 8f3a98d004
1 changed files with 10 additions and 3 deletions
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11
CMakeLists.txt
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@ -198,6 +198,10 @@ option(ENABLE_FGCOM "Set to ON to build the FGCom application (default)" ON
option(ENABLE_FLITE "Set to ON to build the Flite text-to-speech module" ON)
option(ENABLE_QT "Set to ON to build the internal Qt launcher" ON)
# when building an OSG with commit 15ec7e2ae7a8b983ecc44e1ce7363a9a9fa7da95
# applied, we can use better link options
option(OSG_FSTREAM_EXPORT_FIXED "Set to ON if the osgDB fstream export patch is applied" OFF)
if(LOGGING)
# nothing
else()
@ -362,9 +366,12 @@ if(WIN32)
if(MSVC)
set(MSVC_FLAGS "-DNOMINMAX -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_SCL_SECURE_NO_WARNINGS -D__CRT_NONSTDC_NO_WARNINGS /MP")
if (${MSVC_VERSION} GREATER 1599)
if (NOT OSG_FSTREAM_EXPORT_FIXED AND ${MSVC_VERSION} GREATER 1599)
message(STATUS "For better linking performance, use OSG with fixed fstream header")
# needed to avoid link errors on multiply-defined standard C++
# symbols. This issue was fixed in OSG commit 15ec7e2ae7a8b983ecc44e1ce7363a9a9fa7da95
set( MSVC_LD_FLAGS "/FORCE:MULTIPLE" )
endif (${MSVC_VERSION} GREATER 1599)
endif ()
if (${MSVC_VERSION} GREATER 1899)
# needed for debug builds with VS2015