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configure: add --disable-rt option

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This option disables any attempts in configure to create dependency on
stuff requiring linking to librt.so and libpthread.so, in this case this
means clock_gettime(CLOCK_MONOTONIC, &mt).

We were in need to build curl which doesn't link libpthread.so to avoid
the following bug:
https://sourceware.org/bugzilla/show_bug.cgi?id=16628.
This commit is contained in:
Michał Fita 2015-07-23 10:38:49 +01:00 • committed by Daniel Stenberg
parent da650c1e54
commit cee21eb6a7
3 changed files with 54 additions and 14 deletions
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29
acinclude.m4
View file

@ -1851,8 +1851,10 @@ AC_DEFUN([CURL_CHECK_FUNC_CLOCK_GETTIME_MONOTONIC], [
AC_REQUIRE([AC_HEADER_TIME])dnl
AC_CHECK_HEADERS(sys/types.h sys/time.h time.h)
AC_MSG_CHECKING([for monotonic clock_gettime])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
#
if test "x$dontwant_rt" == "xno" ; then
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
@ -1866,17 +1868,18 @@ AC_DEFUN([CURL_CHECK_FUNC_CLOCK_GETTIME_MONOTONIC], [
#include <time.h>
#endif
#endif
]],[[
struct timespec ts;
(void)clock_gettime(CLOCK_MONOTONIC, &ts);
]])
],[
AC_MSG_RESULT([yes])
ac_cv_func_clock_gettime="yes"
],[
AC_MSG_RESULT([no])
ac_cv_func_clock_gettime="no"
])
]],[[
struct timespec ts;
(void)clock_gettime(CLOCK_MONOTONIC, &ts);
]])
],[
AC_MSG_RESULT([yes])
ac_cv_func_clock_gettime="yes"
],[
AC_MSG_RESULT([no])
ac_cv_func_clock_gettime="no"
])
fi
dnl Definition of HAVE_CLOCK_GETTIME_MONOTONIC is intentionally postponed
dnl until library linking and run-time checks for clock_gettime succeed.
])