I am uploading a NMU to fix this.
Please find the debdiff attached.
diff -Nru libapache2-mod-authn-sasl-1.2/debian/changelog
libapache2-mod-authn-sasl-1.2/debian/changelog
--- libapache2-mod-authn-sasl-1.2/debian/changelog 2013-06-15
14:49:57.000000000 +0000
+++ libapache2-mod-authn-sasl-1.2/debian/changelog 2025-02-23
17:39:53.000000000 +0000
@@ -1,3 +1,13 @@
+libapache2-mod-authn-sasl (1.2-2.1) unstable; urgency=medium
+
+ * Non-maintainer upload.
+ * Allow callback type incompatibility. (Closes: #1075139)
+
+ [ Helmut Grohne ]
+ * Fix FTCBFS: Depend on a native apache2-bin. (Closes: #1025362)
+
+ -- Bastian Germann <b...@debian.org> Sun, 23 Feb 2025 17:39:53 +0000
+
libapache2-mod-authn-sasl (1.2-2) unstable; urgency=low
* Preparing Apache2.4 transition (Closes: #666840).
diff -Nru libapache2-mod-authn-sasl-1.2/debian/control
libapache2-mod-authn-sasl-1.2/debian/control
--- libapache2-mod-authn-sasl-1.2/debian/control 2013-06-15
15:20:31.000000000 +0000
+++ libapache2-mod-authn-sasl-1.2/debian/control 2025-02-23
17:38:47.000000000 +0000
@@ -4,7 +4,7 @@
Maintainer: Ulises Vitulli <der...@debian.org>
Uploaders: Rene Mayorga <rmayo...@debian.org>
Build-Depends: dpkg-dev (>= 1.16.1~), debhelper (>= 7), autotools-dev,
apache2-dev,
- libsasl2-dev, libtool, apache2-bin
+ libsasl2-dev, libtool, apache2-bin:native
Standards-Version: 3.9.4
Homepage: http://mod-authn-sasl.sourceforge.net/
diff -Nru libapache2-mod-authn-sasl-1.2/debian/rules
libapache2-mod-authn-sasl-1.2/debian/rules
--- libapache2-mod-authn-sasl-1.2/debian/rules 2013-06-15 14:46:55.000000000
+0000
+++ libapache2-mod-authn-sasl-1.2/debian/rules 2025-02-23 17:39:53.000000000
+0000
@@ -1,6 +1,7 @@
#!/usr/bin/make -f
#export DH_VERBOSE=1
+export DEB_CFLAGS_MAINT_APPEND = -Wno-error=incompatible-pointer-types
DPKG_EXPORT_BUILDFLAGS = 1
include /usr/share/dpkg/buildflags.mk
