Re: [PULL for-5.0 07/10] configure: Support -static-pie if requested

[Laurent Vivier]

On 31/03/2020 05:54, Richard Henderson wrote:
> Recent toolchains support static and pie at the same time.
> 
> As with normal dynamic builds, allow --static to default to PIE
> if supported by the toolchain.  Allow --enable/--disable-pie to
> override the default.
> 
> Reviewed-by: Alex Bennée <address@hidden>
> Signed-off-by: Richard Henderson <address@hidden>
> ---
> v2: Fix --disable-pie --static
> v3: Update for QEMU_LDFLAGS.
> ---
>  configure | 19 ++++++++++++-------
>  1 file changed, 12 insertions(+), 7 deletions(-)

'configure --static" always produces a dynamically linked binary for me

.../configure' '--disable-system' '--enable-user' '--disable-tools'
'--static'
...
CFLAGS            -O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -g
QEMU_CFLAGS         -Werror  -pthread -I/usr/include/glib-2.0
-I/usr/lib64/glib-2.0/include  -fPIE -DPIE -m64 -mcx16 -D_GNU_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes
-Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes
-fno-strict-aliasing -fno-common -fwrapv -std=gnu99
-Wexpansion-to-defined -Wendif-labels -Wno-shift-negative-value
-Wno-missing-include-dirs -Wempty-body -Wnested-externs
-Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers
-Wold-style-declaration -Wold-style-definition -Wtype-limits
-fstack-protector-strong  -I/usr/include/libdrm
-I$(SRC_PATH)/capstone/include
QEMU_LDFLAGS       -Wl,--warn-common -Wl,-z,relro -Wl,-z,now -static-pie
-m64  -fstack-protector-strong
...
static build      yes
...
PIE               yes

make -j 8 m68k-linux-user/clean
make -j 8 m68k-linux-user/all

$ file m68k-linux-user/qemu-m68k
m68k-linux-user/qemu-m68k: ELF 64-bit LSB pie executable, x86-64,
version 1 (GNU/Linux), dynamically linked,
BuildID[sha1]=363ee31697e874085ec53c2af454a070c62647e1, for GNU/Linux
3.2.0, with debug_info, not stripped, too many notes (256)

$ gdb --version
GNU gdb (GDB) Fedora 8.3.50.20190824-30.fc31
Copyright (C) 2019 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
 ld --version
GNU ld version 2.32-31.fc31
Copyright (C) 2019 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later
version.
This program has absolutely no warranty.

Any idea of what happens?

Thanks,
Laurent