llvm-project

Commit Graph

Author	SHA1	Message	Date
Markus Böck	dbeeb136ab	[clang][MinGW] Explicitly ignore `-fPIC` & friends GCC on Windows ignores this flag completely [0] which some build systems sadly rely on when compiling for Windows using MinGW. The current behaviour of clang however is to error out as -fPIC & friends has no effect on Windows. This patch instead changes the behaviour for MinGW to ignore the option for the sake of compatibility Fixes https://github.com/llvm/llvm-project/issues/52947 [0] https://gcc.gnu.org/legacy-ml/gcc-patches/2015-08/msg00836.html Differential Revision: https://reviews.llvm.org/D116485	2022-01-02 12:06:54 +01:00
Saleem Abdulrasool	d133dc226f	Driver: warn on -fPIC/-fpic/-fPIE/-fpie on Windows Use of these flags would result in the use of ELF-style PIE/PIC code which is incorrect on Windows. Windows is inherently PIC by means of the DLL slide that occurs at load. This also mirrors the behaviour on GCC for MinGW. Currently, the Windows x86_64 forces the relocation model to PIC (Level 2). This is unchanged for now, though we should remove any assumptions on that and change it to a static relocation model. llvm-svn: 290533	2016-12-26 03:35:24 +00:00

Author

SHA1

Message

Date

Markus Böck

dbeeb136ab

[clang][MinGW] Explicitly ignore `-fPIC` & friends

GCC on Windows ignores this flag completely [0] which some build systems sadly rely on when compiling for Windows using MinGW. The current behaviour of clang however is to error out as -fPIC & friends has no effect on Windows.

This patch instead changes the behaviour for MinGW to ignore the option for the sake of compatibility

Fixes https://github.com/llvm/llvm-project/issues/52947

[0] https://gcc.gnu.org/legacy-ml/gcc-patches/2015-08/msg00836.html

Differential Revision: https://reviews.llvm.org/D116485

2022-01-02 12:06:54 +01:00

Saleem Abdulrasool

d133dc226f

Driver: warn on -fPIC/-fpic/-fPIE/-fpie on Windows

Use of these flags would result in the use of ELF-style PIE/PIC code
which is incorrect on Windows.  Windows is inherently PIC by means of
the DLL slide that occurs at load.  This also mirrors the behaviour on
GCC for MinGW.  Currently, the Windows x86_64 forces the relocation
model to PIC (Level 2).  This is unchanged for now, though we should
remove any assumptions on that and change it to a static relocation
model.

llvm-svn: 290533

2016-12-26 03:35:24 +00:00

2 Commits