libstdc++: Define _GNU_SOURCE for secure_getenv on Cygwin [PR104217]

For GNU/Linux G++ defines _GNU_SOURCE automatically, but not for Cygwin. This means secure_getenv is not declared by Cygwin's <stdlib.h>, even though autoconf detected it is present in the library. Define it in the source files that want to use secure_getenv. libstdc++-v3/ChangeLog: PR libstdc++/104217 * src/c++17/fs_ops.cc (_GNU_SOURCE): Define. * src/filesystem/dir.cc (_GNU_SOURCE): Define. * src/filesystem/ops.cc (_GNU_SOURCE): Define.
2022-01-25 10:11:36 +00:00
parent c8bd4dc821
commit e20486d508
3 changed files with 12 additions and 0 deletions
@@ -27,6 +27,10 @@
 # define NEED_DO_COPY_FILE
 # define NEED_DO_SPACE
 #endif
+#ifndef _GNU_SOURCE
+// Cygwin needs this for secure_getenv
+# define _GNU_SOURCE 1
+#endif

 #include <bits/largefile-config.h>
 #include <filesystem>
@@ -25,6 +25,10 @@
 #ifndef _GLIBCXX_USE_CXX11_ABI
 # define _GLIBCXX_USE_CXX11_ABI 1
 #endif
+#ifndef _GNU_SOURCE
+// Cygwin needs this for secure_getenv
+# define _GNU_SOURCE 1
+#endif

 #include <bits/largefile-config.h>
 #include <experimental/filesystem>
@@ -27,6 +27,10 @@
 # define NEED_DO_COPY_FILE
 # define NEED_DO_SPACE
 #endif
+#ifndef _GNU_SOURCE
+// Cygwin needs this for secure_getenv
+# define _GNU_SOURCE 1
+#endif

 #include <bits/largefile-config.h>
 #include <experimental/filesystem>