projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| c0c3707f CB |
1 | # strtok_r.m4 serial 15 |
| 2 | dnl Copyright (C) 2002-2004, 2006-2007, 2009-2019 Free Software Foundation, | |
| 421693b0 PA |
3 | dnl Inc. |
| 4 | dnl This file is free software; the Free Software Foundation | |
| 5 | dnl gives unlimited permission to copy and/or distribute it, | |
| 6 | dnl with or without modifications, as long as this notice is preserved. | |
| 7 | ||
| 8 | AC_DEFUN([gl_FUNC_STRTOK_R], | |
| 9 | [ | |
| 10 | dnl The strtok_r() declaration in lib/string.in.h uses 'restrict'. | |
| 11 | AC_REQUIRE([AC_C_RESTRICT]) | |
| 12 | ||
| 13 | AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS]) | |
| 14 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
| 15 | AC_CHECK_FUNCS([strtok_r]) | |
| 16 | if test $ac_cv_func_strtok_r = yes; then | |
| 17 | HAVE_STRTOK_R=1 | |
| 18 | dnl glibc 2.7 has a bug in strtok_r that causes a segmentation fault | |
| 19 | dnl when the second argument to strtok_r is a constant string that has | |
| 20 | dnl exactly one byte and compiling with optimization. This bug is, for | |
| 21 | dnl example, present in the glibc 2.7-18 package in Debian "lenny". | |
| c0c3707f | 22 | dnl See <https://sourceware.org/bugzilla/show_bug.cgi?id=5614>. |
| 421693b0 PA |
23 | AC_CACHE_CHECK([whether strtok_r works], [gl_cv_func_strtok_r_works], |
| 24 | [AC_RUN_IFELSE( | |
| 25 | [AC_LANG_PROGRAM([[ | |
| 26 | #ifndef __OPTIMIZE__ | |
| 27 | # define __OPTIMIZE__ 1 | |
| 28 | #endif | |
| 29 | #undef __OPTIMIZE_SIZE__ | |
| 30 | #undef __NO_INLINE__ | |
| 31 | #include <stdlib.h> | |
| 32 | #include <string.h> | |
| 33 | ]], | |
| 34 | [[static const char dummy[] = "\177\01a"; | |
| 35 | char delimiters[] = "xxxxxxxx"; | |
| 36 | char *save_ptr = (char *) dummy; | |
| 37 | strtok_r (delimiters, "x", &save_ptr); | |
| 38 | strtok_r (NULL, "x", &save_ptr); | |
| 39 | return 0; | |
| 40 | ]]) | |
| 41 | ], | |
| 42 | [gl_cv_func_strtok_r_works=yes], | |
| 43 | [gl_cv_func_strtok_r_works=no], | |
| c0c3707f CB |
44 | [case "$host_os" in |
| 45 | # Guess no on glibc systems. | |
| 46 | *-gnu* | gnu*) gl_cv_func_strtok_r_works="guessing no" ;; | |
| 47 | # Guess yes on native Windows. | |
| 48 | mingw*) gl_cv_func_strtok_r_works="guessing yes" ;; | |
| 49 | *) gl_cv_func_strtok_r_works="guessing yes" ;; | |
| 421693b0 | 50 | esac |
| 421693b0 PA |
51 | ]) |
| 52 | ]) | |
| 53 | case "$gl_cv_func_strtok_r_works" in | |
| 54 | *no) | |
| 55 | dnl We could set REPLACE_STRTOK_R=1 here, but it's only the macro | |
| 56 | dnl version in <bits/string2.h> which is wrong. The code compiled | |
| 57 | dnl into libc is fine. | |
| 58 | UNDEFINE_STRTOK_R=1 | |
| 59 | ;; | |
| 60 | esac | |
| 61 | else | |
| 62 | HAVE_STRTOK_R=0 | |
| 63 | fi | |
| 64 | AC_CHECK_DECLS_ONCE([strtok_r]) | |
| 65 | if test $ac_cv_have_decl_strtok_r = no; then | |
| 66 | HAVE_DECL_STRTOK_R=0 | |
| 67 | fi | |
| 68 | ]) | |
| 69 | ||
| 70 | # Prerequisites of lib/strtok_r.c. | |
| 71 | AC_DEFUN([gl_PREREQ_STRTOK_R], [ | |
| 72 | : | |
| 73 | ]) |