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unicorn/qemu
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Peter Maydell 91de4878f7
configure: Don't claim 'unsupported host OS' when better message available 
The change in commit 898be3e0415c6d which made completely
unrecognized OSes cause an error_exit "Unsupported host OS"
has some unfortunate unintended effects:
* if you run 'configure --help' on an unsupported host OS
(eg if intending to use it as a build machine for a
cross compile to a supported host) then the message
is printed instead of --help
* if the C compiler doesn't work or is missing (eg if
you passed an incorrect --cross-prefix by mistake)
the message is printed instead of the more useful
'compiler does not exist or does not work' message

Fix this by postponing the error_exit in this situation
until later, when we have already identified the more
useful cases for this.

The long term fix for this would be to move handling
of --help much further up in the configure script,
and make its output not dependent on checks that configure
runs. However for 2.9 this would be too invasive.

Backports commit fb59dabd4fa7e6586824ac3012073b943fc8dc79 from qemu
2018-03-09 12:25:14 -05:00
..
accel tcg: Merge opcode arguments into TCGOp 2018-03-05 04:45:20 -05:00
crypto crypto: Clean up includes 2018-02-19 00:47:40 -05:00
default-configs arm64eb: add support for ARM64 big endian. 2017-04-24 23:30:01 +08:00
docs docs: clarify memory region lifecycle 2018-02-12 15:11:21 -05:00
fpu softfloat: fix crash on int conversion of SNaN 2018-03-09 11:40:17 -05:00
hw Include less of the generated modular QAPI headers 2018-03-09 10:06:19 -05:00
include configure: Drop ancient Solaris 9 and earlier support 2018-03-09 12:14:21 -05:00
qapi qapi: Move qapi-schema.json to qapi/, rename generated files 2018-03-09 11:35:11 -05:00
qobject Include qapi/qmp/qlist.h exactly where needed 2018-03-08 08:50:06 -05:00
qom qapi: Move qapi-schema.json to qapi/, rename generated files 2018-03-09 11:35:11 -05:00
scripts qapi: Move qapi-schema.json to qapi/, rename generated files 2018-03-09 11:35:11 -05:00
target util: Introduce include/qemu/cpuid.h 2018-03-09 12:12:00 -05:00
tcg util: Introduce include/qemu/cpuid.h 2018-03-09 12:12:00 -05:00
util oslib-posix: check for posix_memalign in configure script 2018-03-08 08:56:35 -05:00
aarch64.h softfloat: use floatx80_infinity in softfloat 2018-03-09 01:34:45 -05:00
aarch64eb.h softfloat: use floatx80_infinity in softfloat 2018-03-09 01:34:45 -05:00
accel.c clean-up: removed duplicate #includes 2018-02-28 08:51:56 -05:00
arm.h softfloat: use floatx80_infinity in softfloat 2018-03-09 01:34:45 -05:00
armeb.h softfloat: use floatx80_infinity in softfloat 2018-03-09 01:34:45 -05:00
atomic_template.h tcg: Record code_gen_buffer address for user-only memory helpers 2018-03-05 13:48:27 -05:00
CODING_STYLE import 2015-08-21 15:04:50 +08:00
configure configure: Don't claim 'unsupported host OS' when better message available 2018-03-09 12:25:14 -05:00
COPYING import 2015-08-21 15:04:50 +08:00
COPYING.LIB import 2015-08-21 15:04:50 +08:00
cpu-exec-common.c tcg: Add EXCP_ATOMIC 2018-02-27 11:57:58 -05:00
cpu-exec.c exec-all: extract tb->tc_* into a separate struct tc_tb 2018-03-05 02:57:22 -05:00
cpus.c Include qapi/error.h exactly where needed 2018-03-07 12:26:38 -05:00
cputlb.c accel/tcg: add size paremeter in tlb_fill() 2018-03-06 10:56:34 -05:00
exec.c cpu: suffix cpu address spaces with cpu index 2018-03-05 14:41:25 -05:00
gen_all_header.sh arm64eb: add support for ARM64 big endian. 2017-04-24 23:30:01 +08:00
glib_compat.c qapi: Improve qobject input visitor error reporting 2018-03-02 12:05:53 -05:00
HACKING import 2015-08-21 15:04:50 +08:00
header_gen.py softfloat: use floatx80_infinity in softfloat 2018-03-09 01:34:45 -05:00
ioport.c hw: remove pio_addr_t 2018-02-24 02:43:16 -05:00
LICENSE import 2015-08-21 15:04:50 +08:00
m68k.h softfloat: use floatx80_infinity in softfloat 2018-03-09 01:34:45 -05:00
Makefile qapi: Don't create useless directory qapi-generated 2018-03-09 11:36:49 -05:00
Makefile.objs qapi: Move qapi-schema.json to qapi/, rename generated files 2018-03-09 11:35:11 -05:00
Makefile.target qapi-gen: New common driver for code and doc generators 2018-03-09 08:47:12 -05:00
memory.c memory: remove memory_region_test_and_clear_dirty 2018-03-08 09:02:06 -05:00
memory_ldst.inc.c exec: introduce memory_ldst.inc.c 2018-03-01 09:59:34 -05:00
memory_mapping.c include/qemu/osdep.h: Don't include qapi/error.h 2018-02-21 23:08:18 -05:00
mips.h softfloat: use floatx80_infinity in softfloat 2018-03-09 01:34:45 -05:00
mips64.h softfloat: use floatx80_infinity in softfloat 2018-03-09 01:34:45 -05:00
mips64el.h softfloat: use floatx80_infinity in softfloat 2018-03-09 01:34:45 -05:00
mipsel.h softfloat: use floatx80_infinity in softfloat 2018-03-09 01:34:45 -05:00
powerpc.h softfloat: use floatx80_infinity in softfloat 2018-03-09 01:34:45 -05:00
qemu-timer.c timer/cpus: fix some typos and update some comments 2018-02-25 23:21:57 -05:00
rules.mak build-sys: silence make by default or V=0 2018-03-06 08:58:03 -05:00
softmmu_template.h accel/tcg: add size paremeter in tlb_fill() 2018-03-06 10:56:34 -05:00
sparc.h softfloat: use floatx80_infinity in softfloat 2018-03-09 01:34:45 -05:00
sparc64.h softfloat: use floatx80_infinity in softfloat 2018-03-09 01:34:45 -05:00
tcg-runtime-gvec.c tcg: Add generic vector helpers with a scalar operand 2018-03-06 16:10:09 -05:00
tcg-runtime.c exec-all: extract tb->tc_* into a separate struct tc_tb 2018-03-05 02:57:22 -05:00
translate-all.c translate-all: Zero out the TCGContext instance 2018-03-05 15:40:51 -05:00
translate-all.h translate-all.c: Compute L1 page table properties at runtime 2018-02-26 11:46:58 -05:00
translate-common.c exec: Clean up includes 2018-02-19 00:49:55 -05:00
unicorn_common.h qom/cpu: Add MemoryRegion property 2018-02-18 21:54:50 -05:00
VERSION import 2015-08-21 15:04:50 +08:00
vl.c Include qapi/error.h exactly where needed 2018-03-07 12:26:38 -05:00
vl.h import 2015-08-21 15:04:50 +08:00
x86_64.h softfloat: use floatx80_infinity in softfloat 2018-03-09 01:34:45 -05:00