[patch] musl-1.2.1.patch

file_747346.txt (text/plain), 2.22 KB, created by Ed Wildgoose on 2020-10-08 16:56:38 UTC

--- gentoo/sys-libs/musl/musl-1.2.1.ebuild	2020-08-31 14:19:29.510840267 +0100
+++ tpb/sys-libs/musl/musl-1.2.1.ebuild	2020-10-08 17:31:02.225958464 +0100
@@ -60,6 +60,11 @@
 	fi
 }

+src_prepare() {
+	cp "${FILESDIR}/__stack_chk_fail_local.c" "$T/"
+	default
+}
+
 src_configure() {
 	tc-getCC ${CTARGET}
 	just_headers && export CC=true
@@ -86,9 +91,26 @@
 			LDFLAGS="${LDFLAGS}" \
 			VPATH="${DISTDIR}"
 	fi
+
+	# Create a static library for use with GCC fstack-protector calls
+	# On certain architectures gcc emits a locally defined symbol that needs linking into target app
+	$(tc-getCC) ${CFLAGS} -c "${T}"/__stack_chk_fail_local.c -o "${T}"/__stack_chk_fail_local.o
+	$(tc-getAR) r "${T}"/libssp_nonshared.a "${T}"/__stack_chk_fail_local.o
 }

 src_install() {
+	# Avoid breakage while swapping symlink and lib
+	if [ -h ${sysroot}/lib/ld-musl-* ]; then
+	    local ldso=$(basename ${sysroot}/lib/ld-musl-*)
+		eerror "***********************************************************************************"
+		eerror "Warning: Reach carefully! Breakage possible!"
+		eerror "In order to do the switcheroo and swap libc location, some manual changes are needed:"
+		eerror "Manual upgrade needed. run:"
+		einfo "cp --remove-destination ${sysroot}/usr/lib/libc.so ${sysroot}/lib/${ldso}"
+		eerror "***********************************************************************************"
+		die
+	fi
+
 	local target="install"
 	just_headers && target="install-headers"
 	emake DESTDIR="${D}" ${target}
@@ -110,7 +132,7 @@
 		cp "${FILESDIR}"/ldconfig.in "${T}" || die
 		sed -e "s|@@ARCH@@|${arch}|" "${T}"/ldconfig.in > "${T}"/ldconfig || die
 		into /
-		dosbin "${T}"/ldconfig
+	    dosbin "${T}"/ldconfig
 		into /usr
 		dobin "${T}"/getconf
 		dobin "${T}"/getent
@@ -118,6 +140,18 @@
 		echo 'LDPATH="include ld.so.conf.d/*.conf"' > "${T}"/00musl || die
 		doenvd "${T}"/00musl
 	fi
+
+	# Conditionally upgrade /usr/lib/libc.so into a linker script. Useful on x86
+	write_libc_so
+}
+
+write_libc_so() {
+	if [ -e "${sysroot}"/lib/ld-musl-i386.so.1 ]; then
+		rm ${D}/usr/lib/libc.so
+		insinto /usr/lib
+		insopts -m644
+		newins ${FILESDIR}/libc-so-i386.so libc.so
+	fi
 }

 pkg_postinst() {