patch-meson.build

--- meson.build.orig	2023-05-01 08:45:22 UTC
+++ meson.build
@@ -178,6 +178,10 @@ endif
     conf_data.set('HAVE_FCNTL_H', 1)
 endif
 
+if compiler.has_header('execinfo.h')
+    conf_data.set('HAVE_EXECINFO_H', 1)
+endif
+
 if compiler.has_header('libgen.h')
     conf_data.set('HAVE_LIBGEN_H', 1)
 endif
@@ -845,7 +849,7 @@ endif
     conf_data.set('HAVE_ICONV', 1)
 endif
 
-if conf_data.get('CONFIG_OS_DOS') or compiler.has_function('alloca', prefix: '#include <alloca.h>')
+if conf_data.get('CONFIG_OS_DOS') or compiler.has_function('alloca', prefix: '#include <stdlib.h>')
     conf_data.set('HAVE_ALLOCA', 1)
 endif
 
@@ -861,7 +865,7 @@ endif
     conf_data.set('HAVE_GNUTLS_CERTIFICATE_SET_X509_SYSTEM_TRUST', 1)
 endif
 
-if compiler.has_function('mkstemps', prefix: '#include <stdlib.h>', args: '-D_GNU_SOURCE')
+if compiler.has_function('mkstemps', prefix: '#include <unistd.h>')
     conf_data.set('HAVE_MKSTEMPS', 1)
 endif