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[AIX] Emit error for -G option on AIX

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1. Emit error for -G driver option on AIX
2. Adjust cmake file to use -Wl,-G instead of -G

On AIX, legacy XL compiler uses -G to produce a shared object enabled
for use with the run-time linker, which has different meanings from what
it is used for in Clang. And in Clang, other targets do not have -G map
to another functionality in their legacy compiler. So this error is more
important when we are on AIX.

Differential Revision: https://reviews.llvm.org/D89897
This commit is contained in:
Xiangling Liao 2020-10-21 16:50:36 -04:00
parent 077958bf5e
commit 33c020bc1a
1 changed files with 1 additions and 1 deletions
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2
CMakeLists.txt
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@ -930,7 +930,7 @@ if (UNIX AND ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
# Modules should be built with -G, so we can use runtime linking with
# plugins.
string(APPEND CMAKE_MODULE_LINKER_FLAGS " -G")
string(APPEND CMAKE_MODULE_LINKER_FLAGS " -Wl,-G")
# Also set the correct flags for building shared libraries.
string(APPEND CMAKE_SHARED_LINKER_FLAGS " -shared")