C99 compatibility fixes

Backport an upstream patch to the bundled previous version,
and apply a new patch to fix compilation errors with future compilers.

Related to:

  <https://fedoraproject.org/wiki/Changes/PortingToModernC>
  <https://fedoraproject.org/wiki/Toolchain/PortingToModernC>

postgis-c99-2.patch

@@ -0,0 +1,17 @@
+Include <math.h> for isnan.  This avoids an implicit function
+declaration and a build failure with future compilers.
+
+Submitted upstream: <https://github.com/postgis/postgis/pull/725>
+
+diff -ur postgis-3.3.2.orig/loader/shp2pgsql-core.c postgis-3.3.2/loader/shp2pgsql-core.c
+--- postgis-3.3.2.orig/loader/shp2pgsql-core.c	2022-11-13 08:09:23.000000000 +0100
++++ postgis-3.3.2/loader/shp2pgsql-core.c	2023-04-09 22:01:46.377934865 +0200
+@@ -15,6 +15,8 @@
+ 
+ #include "../postgis_config.h"
+ 
++#include <math.h> /* for isnan */
++
+ #include "shp2pgsql-core.h"
+ #include "../liblwgeom/liblwgeom.h"
+ #include "../liblwgeom/lwgeom_log.h" /* for LWDEBUG macros */

postgis-c99.patch

@@ -0,0 +1,54 @@
+commit ae53a53246ccb26a6e82fede1a4184b41bcf097d
+Author: Regina Obe <lr@pcorp.us>
+Date:   Sat Feb 19 00:21:01 2022 -0500
+
+    Fix PG 15 building atoi removed.  References #5100 for PostGIS 3.3.0
+
+diff -ur postgis-3.3.2.orig/postgis-2.5.5/postgis/gserialized_typmod.c postgis-3.3.2/postgis-2.5.5/postgis/gserialized_typmod.c
+--- postgis-3.3.2.orig/postgis-2.5.5/postgis/gserialized_typmod.c	2023-04-09 21:52:47.909294055 +0200
++++ postgis-3.3.2/postgis-2.5.5/postgis/gserialized_typmod.c	2023-04-09 21:55:24.744826310 +0200
+@@ -35,7 +35,7 @@
+ 
+ #include "utils/elog.h"
+ #include "utils/array.h"
+-#include "utils/builtins.h"  /* for pg_atoi */
++#include "utils/builtins.h"  /* for cstring_to_text */
+ #include "lib/stringinfo.h"  /* For binary input */
+ #include "catalog/pg_type.h" /* for CSTRINGOID */
+ 
+@@ -267,8 +267,33 @@
+ 		}
+ 		if ( i == 1 ) /* SRID */
+ 		{
+-			int srid = pg_atoi(DatumGetCString(elem_values[i]),
+-			                   sizeof(int32), '\0');
++			char *int_string = DatumGetCString(elem_values[i]);
++			char *endp;
++			long l;
++			int32_t srid;
++
++			errno = 0;
++			l = strtol(int_string, &endp, 10);
++
++			if (int_string == endp)
++				ereport(ERROR,
++						(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
++						 errmsg("invalid input syntax for type %s: \"%s\"",
++								"integer", int_string)));
++
++			if (errno == ERANGE || l < INT_MIN || l > INT_MAX)
++				ereport(ERROR,
++						(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
++						 errmsg("value \"%s\" is out of range for type %s", int_string,
++								"integer")));
++
++			if (*endp != '\0')
++				ereport(ERROR,
++						(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
++						 errmsg("invalid input syntax for type %s: \"%s\"",
++								"integer", int_string)));
++
++			srid = clamp_srid(l);
+ 			srid = clamp_srid(srid);
+ 			POSTGIS_DEBUGF(3, "srid: %d", srid);
+ 			if ( srid != SRID_UNKNOWN )

postgis.spec

@@ -15,7 +15,7 @@
 
 Name:          postgis
 Version:       3.3.2
-Release:       3%{?dist}
+Release:       4%{?dist}
 Summary:       Geographic Information Systems Extensions to PostgreSQL
 License:       GPLv2+
 
@@ -26,6 +26,8 @@ Source3:       http://download.osgeo.org/%{name}/source/%{name}-%{prevversion}.t
 
 # Add proj8 compatibility to postgis-2.x (needed for upgrade package)
 Patch1:        postgis2-proj8.patch
+Patch2:	       postgis-c99.patch
+Patch3:	       postgis-c99-2.patch
 
 %ifnarch armv7hl
 BuildRequires: SFCGAL-devel
@@ -154,9 +156,12 @@ tar xf %{SOURCE0}
 
 cd %{name}-%{prevversion}
 %patch1 -p1
+%patch -P 2 -p2
+%patch -P 3 -p1
 ./autogen.sh
 )
 %endif
+%patch -P 3 -p1
 cp -p %{SOURCE2} .
 
 
@@ -404,6 +409,9 @@ fi
 
 
 %changelog
+* Sun Apr 09 2023 Florian Weimer <fweimer@redhat.com> - 3.3.2-4
+- C99 compatibility fixes
+
 * Fri Jan 20 2023 Fedora Release Engineering <releng@fedoraproject.org> - 3.3.2-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild