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Philippe Mathieu-Daudé 2fed21d25b disas/libvixl: Protect C system header for C++ compiler 
When selecting an ARM target on Debian unstable, we get:

  Compiling C++ object libcommon.fa.p/disas_libvixl_vixl_utils.cc.o
  FAILED: libcommon.fa.p/disas_libvixl_vixl_utils.cc.o
  c++ -Ilibcommon.fa.p -I. -I.. [...] -o libcommon.fa.p/disas_libvixl_vixl_utils.cc.o -c ../disas/libvixl/vixl/utils.cc
  In file included from /home/philmd/qemu/disas/libvixl/vixl/utils.h:30,
                   from ../disas/libvixl/vixl/utils.cc:27:
  /usr/include/string.h:36:43: error: missing binary operator before token "("
     36 | #if defined __cplusplus && (__GNUC_PREREQ (4, 4) \
        |                                           ^
  /usr/include/string.h:53:62: error: missing binary operator before token "("
     53 | #if defined __USE_MISC || defined __USE_XOPEN || __GLIBC_USE (ISOC2X)
        |                                                              ^
  /usr/include/string.h:165:21: error: missing binary operator before token "("
    165 |      || __GLIBC_USE (LIB_EXT2) || __GLIBC_USE (ISOC2X))
        |                     ^
  /usr/include/string.h:174:43: error: missing binary operator before token "("
    174 | #if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2) || __GLIBC_USE (ISOC2X)
        |                                           ^
  /usr/include/string.h:492:19: error: missing binary operator before token "("
    492 | #if __GNUC_PREREQ (3,4)
        |                   ^

Relevant information from the host:

  $ lsb_release -d
  Description:    Debian GNU/Linux 11 (bullseye)
  $ gcc --version
  gcc (Debian 10.2.1-6) 10.2.1 20210110
  $ dpkg -S /usr/include/string.h
  libc6-dev: /usr/include/string.h
  $ apt-cache show libc6-dev
  Package: libc6-dev
  Version: 2.31-11

Partially cherry-pick vixl commit 78973f258039f6e96 [*]:

  Refactor VIXL to use `extern` block when including C header
  that do not have a C++ counterpart.

which is similar to commit 875df03b22 ('osdep: protect qemu/osdep.h
with extern "C"').

[*] https://git.linaro.org/arm/vixl.git/commit/?id=78973f258039f6e96

Buglink: https://bugs.launchpad.net/qemu/+bug/1914870
Suggested-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-id: 20210516171023.510778-1-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-05-25 16:01:43 +01:00
..
libvixl disas/libvixl: Protect C system header for C++ compiler 2021-05-25 16:01:43 +01:00
alpha.c
arm-a64.cc include/disas/dis-asm.h: Handle being included outside 'extern "C"' 2021-05-10 17:21:54 +01:00
arm.c
capstone.c disas: Push const down through host disassembly 2021-01-07 05:09:42 -10:00
cris.c
hexagon.c Hexagon (disas) disassembler 2021-02-18 07:48:22 -08:00
hppa.c disas/: fix some comment spelling errors 2020-09-17 20:40:08 +02:00
i386.c
m68k.c disas/: fix some comment spelling errors 2020-09-17 20:40:08 +02:00
meson.build Drop the deprecated lm32 target 2021-05-12 18:20:25 +02:00
microblaze.c
mips.c target/mips: Add implementation of GINVT instruction 2020-01-29 19:28:52 +01:00
nanomips.cpp include/disas/dis-asm.h: Handle being included outside 'extern "C"' 2021-05-10 17:21:54 +01:00
nanomips.h
nios2.c
ppc.c disas/: fix some comment spelling errors 2020-09-17 20:40:08 +02:00
riscv.c
s390.c
sh4.c disas/sh4: Add missing fallthrough annotations 2020-07-13 11:40:52 +02:00
sparc.c
xtensa.c