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build: -no-pie is no functional linker flag

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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@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Christian Ehrhardt 2020-12-14 16:09:38 +01:00 committed by Paolo Bonzini
parent a1bcbb485c
commit bbd2d5a812
2 changed files with 0 additions and 4 deletions
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3
configure vendored
View File

@ -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

1
pc-bios/optionrom/Makefile
View File

@ -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