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Re: HOST_* flags are not used by gnulib


From: Mike Gilbert
Subject: Re: HOST_* flags are not used by gnulib
Date: Sun, 27 Jul 2014 14:24:07 -0400

On Sun, Jul 27, 2014 at 2:10 PM, Vladimir 'phcoder' Serbinenko
<address@hidden> wrote:
>
> On 27 Jul 2014 20:07, "Mike Gilbert" <address@hidden> wrote:
>>
>> On Wed, Jul 23, 2014 at 3:41 AM, Vladimir 'φ-coder/phcoder' Serbinenko
>> <address@hidden> wrote:
>> > On 03.04.2014 20:01, Andrey Borzenkov wrote:
>> >> I noticed that host flags are not propagated to gnulib. This does not
>> >> feel right; in particular I noticed it because attempt to enable
>> >> debugging for host tools (HOST_CFLAGS=-g) did not work for gnulib
>> >> files.
>> >>
>> > It should be just CFLAGS (refer to INSTALL)
>>
>> Last I checked, CFLAGS ends up getting used for both host utilities
>> and at least some of the target/boot code. That might be a bug in the
>> build system.
>>
>>
> CFLAGS is used as default for TARGET_CFLAGS. If it happens in another
> context it's most likely a bug. Can you provide more details?

Sure. If I configure with this script:

#!/bin/sh
CHOST=x86_64-pc-linux-gnu
CBUILD=$CHOST
CTARGET=armv7a-hardfloat-linux-gnueabi
S="${HOME}"/src/grub

# This will cause a build failure if passed to armv7a compiler
export CFLAGS="-march=x86-64"
export TARGET_CFLAGS="-Os"

"${S}"/configure --build="${CBUILD}" --host="${CHOST}" --target="${CTARGET}"


I get this build failure:

armv7a-hardfloat-linux-gnueabi-gcc -DHAVE_CONFIG_H -I.
-I/home/floppym/src/grub/grub-core -I..  -Wall -W
-I/home/floppym/src/grub/include -I../include  -DGRUB_MACHINE_UBOOT=1
-DGRUB_MACHINE=ARM_UBOOT -nostdinc -isystem
/usr/lib/gcc/armv7a-hardfloat-linux-gnueabi/4.8.3/include
-DGRUB_FILE=\"lib/disk.c\" -I. -I/home/floppym/src/grub/grub-core -I..
-I/home/floppym/src/grub -I/home/floppym/src/grub/include -I../include
-I/home/floppym/src/grub/grub-core/lib/libgcrypt-grub/src/     -Os
-Wall -W -Wshadow -Wpointer-arith -Wundef -Wchar-subscripts -Wcomment
-Wdeprecated-declarations -Wdisabled-optimization -Wdiv-by-zero
-Wfloat-equal -Wformat-extra-args -Wformat-security -Wformat-y2k
-Wimplicit -Wimplicit-function-declaration -Wimplicit-int -Wmain
-Wmissing-braces -Wmissing-format-attribute -Wmultichar -Wparentheses
-Wreturn-type -Wsequence-point -Wshadow -Wsign-compare -Wswitch
-Wtrigraphs -Wunknown-pragmas -Wunused -Wunused-function
-Wunused-label -Wunused-parameter -Wunused-value  -Wunused-variable
-Wwrite-strings -Wnested-externs -Wstrict-prototypes -g
-Wredundant-decls -Wmissing-prototypes -Wmissing-declarations
-Wcast-align  -Wextra -Wattributes -Wendif-labels -Winit-self
-Wint-to-pointer-cast -Winvalid-pch -Wmissing-field-initializers
-Wnonnull -Woverflow -Wvla -Wpointer-to-int-cast -Wstrict-aliasing
-Wvariadic-macros -Wvolatile-register-var -Wpointer-sign
-Wmissing-prototypes -Wmissing-declarations -Wformat=2
-freg-struct-return -fno-dwarf2-cfi-asm
-fno-asynchronous-unwind-tables -mlong-calls -mthumb-interwork -Qn
-fno-stack-protector -mno-unaligned-access -Wtrampolines -Werror
-ffreestanding  -march=x86-64 -MT lib/disk_module-disk.o -MD -MP -MF
lib/.deps-core/disk_module-disk.Tpo -c -o lib/disk_module-disk.o `test
-f 'lib/disk.c' || echo '/home/floppym/src/grub/grub-core/'`lib/disk.c
armv7a-hardfloat-linux-gnueabi-gcc: error: unrecognized argument in
option ‘-march=x86-64’



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