net/haproxy: fix build on recent -current.

Submitted by:	brooks

net/haproxy24/files/patch-src-tools.c

@@ -0,0 +1,62 @@
+From c03a02388257e21810c534d50a93658e61a83494 Mon Sep 17 00:00:00 2001
+From: Brooks Davis <brooks@one-eyed-alien.net>
+Date: Wed, 28 Feb 2024 18:12:40 +0000
+Subject: [PATCH] MINOR: tools: use public interface for FreeBSD
+ get_exec_path()
+
+Where possible (FreeBSD 13+), use the public, documented interface to
+the ELF auxiliary argument vector: elf_aux_info().
+
+__elf_aux_vector is a private interface exported so that the runtime
+linker can set its value during process startup and not intended for
+public consumption.  In FreeBSD 15 it has been removed from libc and
+moved to libsys.
+---
+ src/tools.c |   14 ++++++++++++++
+ 1 file changed, 14 insertions(+)
+
+diff --git a/src/tools.c b/src/tools.c
+index e1ba241..4759222 100644
+--- src/tools.c
++++ src/tools.c
+@@ -17,9 +17,14 @@
+ #endif
+
+ #if defined(__FreeBSD__)
++#include <sys/param.h>
++#if __FreeBSD_version < 1300058
+ #include <elf.h>
+ #include <dlfcn.h>
+ extern void *__elf_aux_vector;
++#else
++#include <sys/auxv.h>
++#endif
+ #endif
+
+ #if defined(__NetBSD__)
+@@ -5018,6 +5023,7 @@ const char *get_exec_path()
+ 	if (execfn && execfn != ENOENT)
+ 		ret = (const char *)execfn;
+ #elif defined(__FreeBSD__)
++#if __FreeBSD_version < 1300058
+ 	Elf_Auxinfo *auxv;
+ 	for (auxv = __elf_aux_vector; auxv->a_type != AT_NULL; ++auxv) {
+ 		if (auxv->a_type == AT_EXECPATH) {
+@@ -5025,6 +5031,14 @@ const char *get_exec_path()
+ 			break;
+ 		}
+ 	}
++#else
++	static char execpath[MAXPATHLEN];
++
++	if (execpath[0] == '\0')
++		elf_aux_info(AT_EXECPATH, execpath, MAXPATHLEN);
++	if (execpath[0] != '\0')
++		ret = execpath;
++#endif
+ #elif defined(__NetBSD__)
+ 	AuxInfo *auxv;
+ 	for (auxv = _dlauxinfo(); auxv->a_type != AT_NULL; ++auxv) {
+-- 
+1.7.10.4
+