From: Peter Eisentraut <peter@eisentraut.org>
Date: Thu, 11 Dec 2025 08:19:17 +0000 (+0100)
Subject: Make <assert.h> consistently available in frontend and backend
X-Git-Url: http://git.postgresql.org/gitweb/static/gitweb.js?a=commitdiff_plain;h=795e94c70cf13f60b2cb4010f29a1bca542d2031;p=postgresql.git

Make <assert.h> consistently available in frontend and backend

Previously, c.h made <assert.h> only available in frontends (#ifdef
FRONTEND), which was probably reasonable, because the only thing it
would give you is assert(), which you generally shouldn't use in the
backend.  But with C11, <assert.h> also makes available
static_assert(), which would be useful everywhere.  So this patch
moves <assert.h> to the commonly available header files in c.h and
fixes a small complication in regcustom.h that resulted from that.

Co-authored-by: Thomas Munro <thomas.munro@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CA%2BhUKGKvr0x_oGmQTUkx%3DODgSksT2EtgCA6LmGx_jQFG%3DsDUpg%40mail.gmail.com
---

diff --git a/src/include/c.h b/src/include/c.h
index 55effdda0fd..d2cdc76644c 100644
--- a/src/include/c.h
+++ b/src/include/c.h
@@ -59,6 +59,7 @@
 #include "pg_config_os.h"		/* config from include/port/PORTNAME.h */
 
 /* System header files that should be available everywhere in Postgres */
+#include <assert.h>
 #include <inttypes.h>
 #include <stdalign.h>
 #include <stdio.h>
@@ -872,7 +873,6 @@ typedef NameData *Name;
 
 #elif defined(FRONTEND)
 
-#include <assert.h>
 #define Assert(p) assert(p)
 #define AssertMacro(p)	((void) assert(p))
 
diff --git a/src/include/regex/regcustom.h b/src/include/regex/regcustom.h
index 1c0e92f168f..4557e7a62c0 100644
--- a/src/include/regex/regcustom.h
+++ b/src/include/regex/regcustom.h
@@ -53,6 +53,7 @@
 #define FREE(p)			pfree(VS(p))
 #define REALLOC(p,n)	repalloc_extended(VS(p),(n), MCXT_ALLOC_NO_OOM)
 #define INTERRUPT(re)	CHECK_FOR_INTERRUPTS()
+#undef assert
 #define assert(x)		Assert(x)
 
 /* internal character type and related */