caio/clang-p2996
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[flang] Avoid dependency of runtime library on pthread for MinGW

Browse Source 
When building the Fortran runtime on MinGW, `clock_gettime` is currently used. That function is provided by the `pthread` library on that platform. That means that all programs that link `libFortranRuntime` also require to be linked with `pthread` on that platform.

There is already a code path (for MSVC) that doesn't use `clock_gettime` in the implementation of the Fortran library.
Use the same code path also on MinGW by undefining `CLOCKID`.

Reviewed By: vzakhari

Differential Revision: https://reviews.llvm.org/D149051
This commit is contained in:
Markus Mützel
2023-04-25 10:09:20 -07:00
committed by Slava Zakharin
parent 71f862b7bb
commit 3299647699
1 changed files with 6 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
flang/runtime/time-intrinsic.cpp
View File

@@ -56,7 +56,12 @@ template <typename Unused = void> double GetCpuTime(fallback_implementation) {
return -1.0;
}
#if defined CLOCK_PROCESS_CPUTIME_ID
#if defined __MINGW32__
// clock_gettime is implemented in the pthread library for MinGW.
// Using it here would mean that all programs that link libFortranRuntime are
// required to also link to pthread. Instead, don't use the function.
#undef CLOCKID
#elif defined CLOCK_PROCESS_CPUTIME_ID
#define CLOCKID CLOCK_PROCESS_CPUTIME_ID
#elif defined CLOCK_THREAD_CPUTIME_ID
#define CLOCKID CLOCK_THREAD_CPUTIME_ID