Revert use of Clang config files
This reverts commit 49db4a3a15,
9f1f0104f1,
4f95c14adf,
c34dc64028,
570fdcd251,
4bff0298c5 and
6939aee0c0.
When relying on Clang config files, two issues appeared:
- Running the compiler-rt tests fails, because the compiler-rt tests
disable any default config files, breaking the compiler
in this case:
https://github.com/llvm/llvm-project/blob/llvmorg-19.1.1/compiler-rt/test/lit.common.cfg.py#L983
- Wine fails to build using llvm-mingw as cross compiler, because
Wine adds the --no-default-config flag to Clang while compiling,
if supported:
https://gitlab.winehq.org/wine/wine/-/blob/wine-9.19/configure.ac?ref_type=tags#L866-868
This causes llvm-mingw to omit the -rtlib=compiler-rt option
(specified in a config file), making the compiler look for libgcc
instead. Doing a check to see that linking succeeds doesn't necessarily
help here - such a check already exists, but it tests linking with
-nostdlib -nodefaultlibs:
https://gitlab.winehq.org/wine/wine/-/blob/wine-9.19/aclocal.m4?ref_type=tags#L193-L206
Martin Storsjö
e0964ce24c