Stephan Bergmann
870ab3b849
GCC appears to support it at least since <https://gcc.gnu.org/git/
?p=gcc.git;a=commit;h=51e2940139d5e3e86590f6e6802ffc3f3010be5b> "Initial
revision" in 1992, and Clang appears to support it since <https://github.com/
llvm/llvm-project/commit/d93abc3bb0acdd430839abdd67bd3920fee87bbc> "Implement
ffs, parity, and popcount builtins" in Clang 2.4. (And if a build used a
compiler that does not support it, there would be no guarantee that it would
support strings.h function ffs from X/Open System Interfaces, either.)
Introducing HAVE_GCC_BUILTIN_FFS in 334a9f16cd
"tdf#113211: fix calculations with big integers" appears to be due to a
misguided recommendation at <https://gerrit.libreoffice.org/c/core/+/43477/4#
message-899806c724fbdcece0ea9438514a6a5db6a2e645>.
Change-Id: Ib6ee6de548172b3aae25483d03efb86620133933
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/92421
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
System abstraction layer; rtl, osl and sal rtl: Platform independent strings osl: platform specific stuff, threads, dynamic loading, process, ipc, etc Exports only C API and some inline-methods (only C++ API).