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Disable all link optimizations in a debug build.

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This taking linking clang on my machine with gold from 16.980257914 to
15.933037649 seconds.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234161 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2015-04-06 15:04:31 +00:00
parent e104aca94c
commit 6dc9f59df9
1 changed files with 28 additions and 25 deletions
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11
cmake/modules/AddLLVM.cmake
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@ -158,11 +158,13 @@ if(NOT WIN32 AND NOT APPLE)
endif()
function(add_link_opts target_name)
# Don't use linker optimizations in debug builds since it slows down the
# linker in a context where the optimizations are not important.
if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
# Pass -O3 to the linker. This enabled different optimizations on different
# linkers. Don't do it in debug builds since it slows down the linker
# in a context where the optimizations are not important.
if(NOT (${CMAKE_SYSTEM_NAME} MATCHES "Darwin" OR WIN32) AND
NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
# linkers.
if(NOT (${CMAKE_SYSTEM_NAME} MATCHES "Darwin" OR WIN32))
set_property(TARGET ${target_name} APPEND_STRING PROPERTY
LINK_FLAGS " -Wl,-O3")
endif()
@ -189,6 +191,7 @@ function(add_link_opts target_name)
LINK_FLAGS " -Wl,--gc-sections")
endif()
endif()
endif()
endfunction(add_link_opts)
# Set each output directory according to ${CMAKE_CONFIGURATION_TYPES}.