From 62177d06bd9d31242e67995d4e33a755a3447ca2 Mon Sep 17 00:00:00 2001
From: Robin Haberkorn <rhaberkorn@fmsbw.de>
Date: Tue, 19 May 2026 21:21:52 +0400
Subject: check for sbrk() even on UNIX

* Turns out that not all UNIXes support sbrk().
  FreeBSD arm64 and riscv ports don't implement sbrk().
  It's also apparently not in POSIX - so other systems might also
  be affected.
  This needs to be passed on to dlmalloc.
* We now use DLMALLOC_CPPFLAGS instead of conditionals to pass
  on flags to dlmalloc.
* Should be backported to the FreeBSD v2.5.2 package
  to fix Poudriere fallout.
---
 configure.ac | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index b5cac0b..43b4d1b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -18,10 +18,10 @@ AC_CANONICAL_BUILD
 AC_CANONICAL_HOST
 
 AX_CHECK_ENABLE_DEBUG
-AM_CONDITIONAL(DEBUG, [test x$ax_enable_debug != xno])
 if [[ x$ax_enable_debug = xno ]]; then
 	# glib does not look at NDEBUG
 	AC_DEFINE(G_DISABLE_ASSERT, 1, [Disable g_assert()])
+	DLMALLOC_CPPFLAGS="$DLMALLOC_CPPFLAGS -DINSECURE=1"
 fi
 
 # Use the user provided CXXFLAGS for Scintilla as well.
@@ -224,6 +224,13 @@ case $host in
 	;;
 esac
 
+# Optional UNIX libc functions.
+# FreeBSD arm64 and riscv are missing sbrk(), which can be used by dlmalloc.
+AC_CHECK_FUNCS([sbrk], , [
+	DLMALLOC_CPPFLAGS="$DLMALLOC_CPPFLAGS -DHAVE_MORECORE=0"
+])
+AC_SUBST(DLMALLOC_CPPFLAGS)
+
 #
 # Config options
 #
-- 
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