[Buildroot] [PATCH 1/1] package/qemu: fix build with latest binutils

* [Buildroot] [PATCH 1/1] package/qemu: fix build with latest binutils
@ 2021-05-22 16:53 Fabrice Fontaine
  2021-05-24  8:18 ` Yann E. MORIN
  2021-06-08  8:23 ` Peter Korsgaard
  0 siblings, 2 replies; 3+ messages in thread
From: Fabrice Fontaine @ 2021-05-22 16:53 UTC (permalink / raw)
  To: buildroot

Fixes:
 - http://autobuild.buildroot.org/results/c0881df995093036eb7579d870efcae3feb323aa

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
---
 ...-no-pie-is-no-functional-linker-flag.patch | 79 +++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 package/qemu/0005-build-no-pie-is-no-functional-linker-flag.patch

diff --git a/package/qemu/0005-build-no-pie-is-no-functional-linker-flag.patch b/package/qemu/0005-build-no-pie-is-no-functional-linker-flag.patch
new file mode 100644
index 0000000000..6a21949157
--- /dev/null
+++ b/package/qemu/0005-build-no-pie-is-no-functional-linker-flag.patch
@@ -0,0 +1,79 @@
+From bbd2d5a8120771ec59b86a80a1f51884e0a26e53 Mon Sep 17 00:00:00 2001
+From: Christian Ehrhardt <christian.ehrhardt@canonical.com>
+Date: Mon, 14 Dec 2020 16:09:38 +0100
+Subject: [PATCH] build: -no-pie is no functional linker flag
+
+Recent binutils changes dropping unsupported options [1] caused a build
+issue in regard to the optionroms.
+
+  ld -m elf_i386 -T /<<PKGBUILDDIR>>/pc-bios/optionrom//flat.lds -no-pie \
+    -s -o multiboot.img multiboot.o
+  ld.bfd: Error: unable to disambiguate: -no-pie (did you mean --no-pie ?)
+
+This isn't really a regression in ld.bfd, filing the bug upstream
+revealed that this never worked as a ld flag [2] - in fact it seems we
+were by accident setting --nmagic).
+
+Since it never had the wanted effect this usage of LDFLAGS_NOPIE, should be
+droppable without any effect. This also is the only use-case of LDFLAGS_NOPIE
+in .mak, therefore we can also remove it from being added there.
+
+[1]: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=983d925d
+[2]: https://sourceware.org/bugzilla/show_bug.cgi?id=27050#c5
+
+Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
+Message-Id: <20201214150938.1297512-1-christian.ehrhardt@canonical.com>
+Cc: qemu-stable at nongnu.org
+Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
+
+[Retrieved from:
+https://gitlab.com/qemu-project/qemu/-/commit/bbd2d5a8120771ec59b86a80a1f51884e0a26e53]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ configure                  | 3 ---
+ pc-bios/optionrom/Makefile | 1 -
+ 2 files changed, 4 deletions(-)
+
+diff --git a/configure b/configure
+index cb21108d34..c228f7c21e 100755
+--- a/configure
++++ b/configure
+@@ -2137,7 +2137,6 @@ EOF
+ # Check we support --no-pie first; we will need this for building ROMs.
+ if compile_prog "-Werror -fno-pie" "-no-pie"; then
+   CFLAGS_NOPIE="-fno-pie"
+-  LDFLAGS_NOPIE="-no-pie"
+ fi
+ 
+ if test "$static" = "yes"; then
+@@ -2153,7 +2152,6 @@ if test "$static" = "yes"; then
+   fi
+ elif test "$pie" = "no"; then
+   CONFIGURE_CFLAGS="$CFLAGS_NOPIE $CONFIGURE_CFLAGS"
+-  CONFIGURE_LDFLAGS="$LDFLAGS_NOPIE $CONFIGURE_LDFLAGS"
+ elif compile_prog "-Werror -fPIE -DPIE" "-pie"; then
+   CONFIGURE_CFLAGS="-fPIE -DPIE $CONFIGURE_CFLAGS"
+   CONFIGURE_LDFLAGS="-pie $CONFIGURE_LDFLAGS"
+@@ -6714,7 +6712,6 @@ echo "QEMU_CXXFLAGS=$QEMU_CXXFLAGS" >> $config_host_mak
+ echo "GLIB_CFLAGS=$glib_cflags" >> $config_host_mak
+ echo "GLIB_LIBS=$glib_libs" >> $config_host_mak
+ echo "QEMU_LDFLAGS=$QEMU_LDFLAGS" >> $config_host_mak
+-echo "LDFLAGS_NOPIE=$LDFLAGS_NOPIE" >> $config_host_mak
+ echo "LD_I386_EMULATION=$ld_i386_emulation" >> $config_host_mak
+ echo "EXESUF=$EXESUF" >> $config_host_mak
+ echo "HOST_DSOSUF=$HOST_DSOSUF" >> $config_host_mak
+diff --git a/pc-bios/optionrom/Makefile b/pc-bios/optionrom/Makefile
+index 084fc10f05..30771f8d17 100644
+--- a/pc-bios/optionrom/Makefile
++++ b/pc-bios/optionrom/Makefile
+@@ -41,7 +41,6 @@ override CFLAGS += $(call cc-option, $(Wa)-32)
+ 
+ LD_I386_EMULATION ?= elf_i386
+ override LDFLAGS = -m $(LD_I386_EMULATION) -T $(SRC_DIR)/flat.lds
+-override LDFLAGS += $(LDFLAGS_NOPIE)
+ 
+ all: multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin pvh.bin
+ 
+-- 
+GitLab
+
-- 
2.30.2

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