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@@ -79,24 +79,21 @@ AC_DEFUN([AC_PC_FROM_UCONTEXT],
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if ! $pc_field_found; then
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# Prefer sys/ucontext.h to ucontext.h, for OS X's sake.
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if test "x$ac_cv_header_cygwin_signal_h" = xyes; then
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- AC_TRY_COMPILE([#define _GNU_SOURCE 1
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- #include <cygwin/signal.h>],
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+ AC_TRY_COMPILE([#include <cygwin/signal.h>],
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[ucontext_t u; return u.$pc_field == 0;],
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AC_DEFINE_UNQUOTED(PC_FROM_UCONTEXT, $pc_field,
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How to access the PC from a struct ucontext)
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AC_MSG_RESULT([$pc_field])
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pc_field_found=true)
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elif test "x$ac_cv_header_sys_ucontext_h" = xyes; then
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- AC_TRY_COMPILE([#define _GNU_SOURCE 1
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- #include <sys/ucontext.h>],
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+ AC_TRY_COMPILE([#include <sys/ucontext.h>],
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[ucontext_t u; return u.$pc_field == 0;],
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AC_DEFINE_UNQUOTED(PC_FROM_UCONTEXT, $pc_field,
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How to access the PC from a struct ucontext)
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AC_MSG_RESULT([$pc_field])
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pc_field_found=true)
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elif test "x$ac_cv_header_ucontext_h" = xyes; then
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- AC_TRY_COMPILE([#define _GNU_SOURCE 1
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- #include <ucontext.h>],
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+ AC_TRY_COMPILE([#include <ucontext.h>],
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[ucontext_t u; return u.$pc_field == 0;],
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AC_DEFINE_UNQUOTED(PC_FROM_UCONTEXT, $pc_field,
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How to access the PC from a struct ucontext)
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