meson: Don't check for posix_memalign on windows

There's a mingw bug for this, it exports __builtin_posix_memalign but
not posix_memalign, so the check will succeed, but compiling will fail.

1 files changed, 11 insertions, 2 deletions

diff --git a/meson.build b/meson.build
index c08614e385..43749e9628 100644
--- a/meson.build
+++ b/meson.build
@@ -972,13 +972,22 @@ foreach h : ['xlocale.h', 'sys/sysctl.h', 'linux/futex.h', 'endian.h']
     pre_args += '-DHAVE_@0@'.format(h.to_upper().underscorify())
   endif
 endforeach
-
-foreach f : ['strtof', 'mkostemp', 'posix_memalign', 'timespec_get', 'memfd_create']
+foreach f : ['strtof', 'mkostemp', 'timespec_get', 'memfd_create']
   if cc.has_function(f)
     pre_args += '-DHAVE_@0@'.format(f.to_upper())
   endif
 endforeach
 
+# MinGW provides a __builtin_posix_memalign function, but not a posix_memalign.
+# This means that this check will succeed, but then compilation will later
+# fail. MSVC doesn't have this function at all, so only check for it on
+# non-windows platforms.
+if host_machine.system() != 'windows'
+  if cc.has_function('posix_memalign')
+    pre_args += '-DHAVE_POSIX_MEMALIGN'
+  endif
+endif
+
 # strtod locale support
 if cc.links('''
     #define _GNU_SOURCE