[Mesa-dev] [PATCH v4 23/49] meson: Don't check for posix_memalign on windows

[Dylan Baker]

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.
---
 meson.build | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/meson.build b/meson.build
index 0f37117e3fc..c89b805e71f 100644
--- a/meson.build
+++ b/meson.build
@@ -1048,13 +1048,22 @@ foreach h : ['xlocale.h', 'sys/sysctl.h', 'linux/futex.h', 'endian.h', 'dlfcn.h'
     pre_args += '-DHAVE_ at 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_ at 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
-- 
2.18.0