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ax_check_catchable_abrt.m4
(1.27 KB)
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ax_check_catchable_segv.m4
(1.46 KB)
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ax_check_compile_flag.m4
(3.3 KB)
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ax_check_define.m4
(3.39 KB)
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ax_check_gnu_make.m4
(3.34 KB)
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ax_check_link_flag.m4
(3.19 KB)
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ax_pthread.m4
(20.33 KB)
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ax_tls.m4
(2.97 KB)
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ax_valgrind_check.m4
(8.82 KB)
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ld-output-def.m4
(1.03 KB)
Editing: ax_check_catchable_segv.m4
# SYNOPSIS # # AX_CHECK_CATCHABLE_SEGV # # DESCRIPTION # # Check whether segmentation violations can be caught using signal handlers. #serial 1 AC_DEFUN([AX_CHECK_CATCHABLE_SEGV], [dnl AC_PREREQ(2.64) AS_VAR_PUSHDEF([CACHEVAR], [ax_cv_check_[]_AC_LANG_ABBREV[]CATCHABLE_SEGV])dnl AC_CACHE_CHECK([whether segmentation violations can be caught when using the _AC_LANG compiler], CACHEVAR, [ AC_RUN_IFELSE([ AC_LANG_PROGRAM([[ #include <signal.h> #include <stdlib.h> static void sig(int _) { exit(0); } ]], [[ volatile unsigned char * volatile x = (volatile unsigned char *) malloc(8); size_t i; signal(SIGSEGV, sig); signal(SIGBUS, sig); #if !defined(__SANITIZE_ADDRESS__) && !defined(__EMSCRIPTEN__) for (i = 0; i < 10000000; i += 1024) { x[-i] = x[i] = (unsigned char) i; } #endif free((void *) x); exit(1) ]])], [AS_VAR_SET(CACHEVAR, [yes])], [AS_VAR_SET(CACHEVAR, [no])], [AS_VAR_SET(CACHEVAR, [unknown])] ) ]) AS_VAR_IF(CACHEVAR, yes, [AC_DEFINE([HAVE_CATCHABLE_SEGV], [1], [Define if segmentation violations can be caught using signal handlers])], [AC_MSG_WARN([On this platform, segmentation violations cannot be caught using signal handlers. This is expected if you enabled a tool such as Address Sanitizer (-fsanitize=address), but be aware that using Address Sanitizer may also significantly reduce performance.])] ) AS_VAR_POPDEF([CACHEVAR])dnl ])
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