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configure: Don't fall back to gthread coroutine backend

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The gthread coroutine backend is broken and does not produce a working
QEMU; it is only useful for some very limited debugging situations.
Clean up the backend selection logic in configure so that it now runs
"if on windows use windows; else prefer ucontext; else sigaltstack".

To do this we refactor the configure code to separate out "test
whether we have a working ucontext", "pick a default if user didn't
specify" and "validate that user didn't specify something invalid",
rather than having all three of these run together. We also simplify
the Makefile logic so it just links in the backend the configure
script selects.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1365419487-19867-3-git-send-email-peter.maydell@linaro.org
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Peter Maydell 2013-04-08 12:11:27 +01:00 • committed by Anthony Liguori
parent 76ad07a493
commit 7c2acc7062
3 changed files with 48 additions and 46 deletions
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14
tests/Makefile
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@ -24,19 +24,7 @@ gcov-files-test-string-input-visitor-y = qapi/string-input-visitor.c
check-unit-y += tests/test-string-output-visitor$(EXESUF)
gcov-files-test-string-output-visitor-y = qapi/string-output-visitor.c
check-unit-y += tests/test-coroutine$(EXESUF)
ifeq ($(CONFIG_WIN32),y)
gcov-files-test-coroutine-y = coroutine-win32.c
else
ifeq ($(CONFIG_UCONTEXT_COROUTINE),y)
gcov-files-test-coroutine-y = coroutine-ucontext.c
else
ifeq ($(CONFIG_SIGALTSTACK_COROUTINE),y)
gcov-files-test-coroutine-y = coroutine-sigaltstack.c
else
gcov-files-test-coroutine-y = coroutine-gthread.c
endif
endif
endif
gcov-files-test-coroutine-y = coroutine-$(CONFIG_COROUTINE_BACKEND).c
check-unit-y += tests/test-visitor-serialization$(EXESUF)
check-unit-y += tests/test-iov$(EXESUF)
gcov-files-test-iov-y = util/iov.c