dev-libs/log4cpp: fix clang16 build

Closes: https://bugs.gentoo.org/906535
Closes: https://bugs.gentoo.org/895054
Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>
Closes: https://github.com/gentoo/gentoo/pull/32995
Signed-off-by: Sam James <sam@gentoo.org>

dev-libs/log4cpp/files/log4cpp-1.1.3-fix-implicit-func-in-configure.patch

@@ -0,0 +1,20 @@
+clang16 throws an error because of the implicit function declaration of exit().
+This leads to the wrong assumption that snprintf is not present on the system.
+
+Bug: https://bugs.gentoo.org/906535
+Upstream PR: https://sourceforge.net/p/log4cpp/codegit/merge-requests/10/
+
+#  Pascal Jäger <pascal.jaeger@leimstift.de> (2023-09-22)
+
+--- a/m4/AC_FUNC_SNPRINTF.m4
++++ b/m4/AC_FUNC_SNPRINTF.m4
+@@ -12,7 +12,8 @@ dnl @author Caolan McNamara <caolan@skynet.ie>
+ dnl
+ AC_DEFUN([AC_FUNC_SNPRINTF],
+ [AC_CACHE_CHECK(for working snprintf, ac_cv_func_snprintf,
+-[AC_TRY_RUN([#include <stdio.h>
++[AC_TRY_RUN([#include <stdlib.h>
++#include <stdio.h>
+ int main () { int l = snprintf(NULL,0,"%d",100); exit (!((3 <= l) || (-1 == l))); }
+ ], ac_cv_func_snprintf=yes, ac_cv_func_snprintf=no,
+ ac_cv_func_snprintf=no)])

dev-libs/log4cpp/log4cpp-1.1.3-r3.ebuild

@@ -0,0 +1,60 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit autotools flag-o-matic
+
+DESCRIPTION="C++ classes for flexible logging to files, syslog and other destinations"
+HOMEPAGE="https://log4cpp.sourceforge.net/"
+SRC_URI="mirror://sourceforge/${PN}/${P}.tar.gz"
+S="${WORKDIR}/${PN}"
+
+LICENSE="LGPL-2.1"
+SLOT="0/5"
+KEYWORDS="~amd64 ~arm ~ppc ~riscv ~s390 ~x86"
+IUSE="doc test"
+RESTRICT="!test? ( test )"
+
+BDEPEND="doc? ( app-doc/doxygen )"
+
+PATCHES=(
+	"${FILESDIR}"/1.0-doc_install_path.patch
+	"${FILESDIR}"/1.0-gcc43.patch
+	"${FILESDIR}"/1.0-asneeded.patch
+	"${FILESDIR}"/${PN}-1.1-cmath-fix.patch
+	"${FILESDIR}"/${PN}-1.1-automake-1.13.patch
+	"${FILESDIR}"/${PN}-1.1-glibc-2.31.patch
+	"${FILESDIR}"/${PN}-1.1.3-fix-version.patch
+	"${FILESDIR}"/${PN}-1.1.3-fix-implicit-func-in-configure.patch
+)
+
+src_prepare() {
+	default
+
+	mv configure.{in,ac} || die
+
+	# Build tests conditionally
+	if ! use test; then
+		sed -i -e '/^SUBDIRS/s/ tests//' Makefile.am || die
+	fi
+
+	eautoreconf
+}
+
+src_configure() {
+	append-cxxflags -Wno-register # https://bugs.gentoo.org/895054
+	# Bashisms call configure tests to malfunction / config.h to be misgenerated
+	# which then causes a build failure later on in the package (w/ GCC 12,
+	# anyway).
+	CONFIG_SHELL="${BROOT}"/bin/bash econf \
+		--without-idsa \
+		$(use_enable doc doxygen)
+}
+
+src_install() {
+	default
+
+	# Package installs .pc files
+	find "${ED}" -name '*.la' -delete || die
+}