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[CMake] Disable -fno-semantic-interposition for GCC<10.3 on SystemZ 

`-fno-semantic-interposition` was added for GCC in D102453, but some MLIR tests
on SystemZ failed with GCC<10.3 due to a bug.

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D105453
This commit is contained in:
Haruki Imai 2021-07-08 22:09:21 -07:00 committed by Fangrui Song
parent 55bd12d4b7
commit 62cc3cdda6
1 changed files with 4 additions and 2 deletions
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6
llvm/cmake/modules/HandleLLVMOptions.cmake
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@ -313,13 +313,15 @@ if( LLVM_ENABLE_PIC )
add_flag_or_print_warning("-fPIC" FPIC)
# Enable interprocedural optimizations for non-inline functions which would
# otherwise be disabled due to GCC -fPIC's default.
# Note: GCC<10.3 has a bug on SystemZ.
#
# Note: Clang allows IPO for -fPIC so this optimization is less effective.
# Older Clang may support -fno-semantic-interposition but it used local
# aliases to optimize global variables, which is incompatible with copy
# relocations due to -fno-pic.
if (CMAKE_COMPILER_IS_GNUCXX OR (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND
CMAKE_CXX_COMPILER_VERSION GREATER_EQUAL 13))
if ((CMAKE_COMPILER_IS_GNUCXX AND
NOT (LLVM_NATIVE_ARCH STREQUAL "SystemZ" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 10.3))
OR (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND CMAKE_CXX_COMPILER_VERSION GREATER_EQUAL 13))
add_flag_if_supported("-fno-semantic-interposition" FNO_SEMANTIC_INTERPOSITION)
endif()
endif()