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| author | Ben Gamari <ben@well-typed.com> | 2022-04-01 13:28:22 -0400 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2022-04-07 09:42:42 -0400 |
| commit | fcef9a175f810e7bfccbae9bf9e79b2b95da17ab (patch) | |
| tree | f6abbd79400d296cd03a3022e133c2b48dc9e951 /m4 | |
| parent | 9eeaeca4e95d58f362737bceead0ae2e16bcbbbb (diff) | |
| download | haskell-fcef9a175f810e7bfccbae9bf9e79b2b95da17ab.tar.gz | |
configure: Make environ decl check more robust
Some platforms (e.g. Windows/clang64) declare `environ` in `<stdlib.h>`,
not `<unistd.h>`
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/fp_check_environ.m4 | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/m4/fp_check_environ.m4 b/m4/fp_check_environ.m4 index 88bf0a52de..f0daedc9c0 100644 --- a/m4/fp_check_environ.m4 +++ b/m4/fp_check_environ.m4 @@ -4,11 +4,14 @@ AC_DEFUN([FP_CHECK_ENVIRON], [ dnl-------------------------------------------------------------------- dnl * Check whether the libc headers provide a declaration for the - dnl environ symbol. If not then we will provide one in RtsSymbols.c. + dnl environ symbol. If not then we will provide one in RtsSymbols.c. dnl See #20512, #20577, #20861. + dnl + dnl N.B. Windows declares environ in <stdlib.h>; most others declare it + dnl in <unistd.h>. dnl-------------------------------------------------------------------- AC_CHECK_DECLS([environ], [], [], [ + #include <stdlib.h> #include <unistd.h> ]) ]) - |