Backpatch: Fix warnings about declaration of environ on MinGW

anarazel · anarazel · commit 371d40c1a3ff · 2025-11-04T13:24:58.000-05:00
Backpatch commit 7bc9a8b to 13-17. The motivation for backpatching is that we want to update CI to Debian Trixie. Trixie contains a newer mingw installation, which would trigger the warning addressed by 7bc9a8b. The risk of backpatching seems fairly low, given that it did not cause issues in the branches the commit is already present. While CI is not present in 13-14, it seems better to be consistent across branches. Author: Thomas Munro <tmunro@postgresql.org> Discussion: https://postgr.es/m/o5yadhhmyjo53svzwvaocww6zkrp63i4f32cw3treuh46pxtza@hyqio5b2tkt6 Backpatch-through: 13
diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
@@ -947,7 +947,9 @@ PostmasterMain(int argc, char *argv[])
 
 	/* For debugging: display postmaster environment */
 	{
+#if !defined(WIN32) || defined(_MSC_VER)
 		extern char **environ;
+#endif
 		char	  **p;
 
 		ereport(DEBUG3,
diff --git a/src/backend/utils/misc/ps_status.c b/src/backend/utils/misc/ps_status.c
@@ -32,7 +32,9 @@
 #include "utils/guc.h"
 #include "utils/ps_status.h"
 
+#if !defined(WIN32) || defined(_MSC_VER)
 extern char **environ;
+#endif
 bool		update_process_title = true;
 
 
diff --git a/src/test/regress/regress.c b/src/test/regress/regress.c
@@ -634,7 +634,9 @@ PG_FUNCTION_INFO_V1(get_environ);
 Datum
 get_environ(PG_FUNCTION_ARGS)
 {
+#if !defined(WIN32) || defined(_MSC_VER)
 	extern char **environ;
+#endif
 	int			nvals = 0;
 	ArrayType  *result;
 	Datum	   *env;

Original file line number	Diff line number	Diff line change
`@@ -947,7 +947,9 @@ PostmasterMain(int argc, char *argv[])`
`947`	`947`
`948`	`948`	`/* For debugging: display postmaster environment */`
`949`	`949`	`{`
	`950`	`+#if !defined(WIN32) \|\| defined(_MSC_VER)`
`950`	`951`	`extern char **environ;`
	`952`	`+#endif`
`951`	`953`	`char **p;`
`952`	`954`
`953`	`955`	`ereport(DEBUG3,`