| 1 | dnl On the NeXT, #including <utime.h> doesn't give you a definition for |
| 2 | dnl struct utime, unless you #define _POSIX_SOURCE. |
| 3 | |
| 4 | AC_DEFUN([GUILE_STRUCT_UTIMBUF], [ |
| 5 | AC_CACHE_CHECK([whether we need POSIX to get struct utimbuf], |
| 6 | guile_cv_struct_utimbuf_needs_posix, |
| 7 | [AC_TRY_CPP([ |
| 8 | #ifdef __EMX__ |
| 9 | #include <sys/utime.h> |
| 10 | #else |
| 11 | #include <utime.h> |
| 12 | #endif |
| 13 | struct utime blah; |
| 14 | ], |
| 15 | guile_cv_struct_utimbuf_needs_posix=no, |
| 16 | guile_cv_struct_utimbuf_needs_posix=yes)]) |
| 17 | if test "$guile_cv_struct_utimbuf_needs_posix" = yes; then |
| 18 | AC_DEFINE([UTIMBUF_NEEDS_POSIX], 1, |
| 19 | [Define this if <utime.h> doesn't define struct utimbuf unless |
| 20 | _POSIX_SOURCE is defined. See GUILE_STRUCT_UTIMBUF in aclocal.m4.]) |
| 21 | fi]) |
| 22 | |
| 23 | |
| 24 | |
| 25 | |
| 26 | dnl |
| 27 | dnl Apparently, at CMU they have a weird version of libc.h that is |
| 28 | dnl installed in /usr/local/include and conflicts with unistd.h. |
| 29 | dnl In these situations, we should not #include libc.h. |
| 30 | dnl This test arranges to #define LIBC_H_WITH_UNISTD_H iff libc.h is |
| 31 | dnl present on the system, and is safe to #include. |
| 32 | dnl |
| 33 | AC_DEFUN([GUILE_HEADER_LIBC_WITH_UNISTD], |
| 34 | [ |
| 35 | AC_CHECK_HEADERS(libc.h unistd.h) |
| 36 | AC_CACHE_CHECK( |
| 37 | [whether libc.h and unistd.h can be included together], |
| 38 | guile_cv_header_libc_with_unistd, |
| 39 | [ |
| 40 | if test "$ac_cv_header_libc_h" = "no"; then |
| 41 | guile_cv_header_libc_with_unistd="no" |
| 42 | elif test "$ac_cv_header_unistd_h" = "no"; then |
| 43 | guile_cv_header_libc_with_unistd="yes" |
| 44 | else |
| 45 | AC_TRY_COMPILE( |
| 46 | [ |
| 47 | # include <libc.h> |
| 48 | # include <unistd.h> |
| 49 | ], |
| 50 | [], |
| 51 | [guile_cv_header_libc_with_unistd=yes], |
| 52 | [guile_cv_header_libc_with_unistd=no] |
| 53 | ) |
| 54 | fi |
| 55 | ] |
| 56 | ) |
| 57 | if test "$guile_cv_header_libc_with_unistd" = yes; then |
| 58 | AC_DEFINE(LIBC_H_WITH_UNISTD_H, 1, |
| 59 | [Define this if we should include <libc.h> when we've already |
| 60 | included <unistd.h>. On some systems, they conflict, and libc.h |
| 61 | should be omitted. See GUILE_HEADER_LIBC_WITH_UNISTD in |
| 62 | aclocal.m4.]) |
| 63 | fi |
| 64 | ] |
| 65 | ) |
| 66 | |
| 67 | |
| 68 | |
| 69 | dnl This is needed when we want to check for the same function repeatedly |
| 70 | dnl with other parameters, such as libraries, varying. |
| 71 | dnl |
| 72 | dnl GUILE_NAMED_CHECK_FUNC(FUNCTION, TESTNAME, |
| 73 | dnl [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]) |
| 74 | AC_DEFUN([GUILE_NAMED_CHECK_FUNC], |
| 75 | [AC_MSG_CHECKING([for $1]) |
| 76 | AC_CACHE_VAL(ac_cv_func_$1_$2, |
| 77 | [AC_TRY_LINK( |
| 78 | dnl Don't include <ctype.h> because on OSF/1 3.0 it includes <sys/types.h> |
| 79 | dnl which includes <sys/select.h> which contains a prototype for |
| 80 | dnl select. Similarly for bzero. |
| 81 | [/* System header to define __stub macros and hopefully few prototypes, |
| 82 | which can conflict with char $1(); below. */ |
| 83 | #include <assert.h> |
| 84 | /* Override any gcc2 internal prototype to avoid an error. */ |
| 85 | #ifdef __cplusplus |
| 86 | extern "C" |
| 87 | #endif |
| 88 | /* We use char because int might match the return type of a gcc2 |
| 89 | builtin and then its argument prototype would still apply. */ |
| 90 | char $1(); |
| 91 | ], [ |
| 92 | /* The GNU C library defines this for functions which it implements |
| 93 | to always fail with ENOSYS. Some functions are actually named |
| 94 | something starting with __ and the normal name is an alias. */ |
| 95 | #if defined (__stub_$1) || defined (__stub___$1) |
| 96 | choke me |
| 97 | #else |
| 98 | $1(); |
| 99 | #endif |
| 100 | ], eval "ac_cv_func_$1_$2=yes", eval "ac_cv_func_$1_$2=no")]) |
| 101 | if eval "test \"`echo '$ac_cv_func_'$1'_'$2`\" = yes"; then |
| 102 | AC_MSG_RESULT(yes) |
| 103 | ifelse([$3], , :, [$3]) |
| 104 | else |
| 105 | AC_MSG_RESULT(no) |
| 106 | ifelse([$4], , , [$4 |
| 107 | ])dnl |
| 108 | fi |
| 109 | ]) |
| 110 | |
| 111 | |
| 112 | |
| 113 | |
| 114 | dnl Available from the GNU Autoconf Macro Archive at: |
| 115 | dnl http://www.gnu.org/software/ac-archive/htmldoc/acx_pthread.html |
| 116 | dnl |
| 117 | AC_DEFUN([ACX_PTHREAD], [ |
| 118 | AC_REQUIRE([AC_CANONICAL_HOST]) |
| 119 | AC_LANG_SAVE |
| 120 | AC_LANG_C |
| 121 | acx_pthread_ok=no |
| 122 | |
| 123 | # We used to check for pthread.h first, but this fails if pthread.h |
| 124 | # requires special compiler flags (e.g. on True64 or Sequent). |
| 125 | # It gets checked for in the link test anyway. |
| 126 | |
| 127 | # First of all, check if the user has set any of the PTHREAD_LIBS, |
| 128 | # etcetera environment variables, and if threads linking works using |
| 129 | # them: |
| 130 | if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then |
| 131 | save_CFLAGS="$CFLAGS" |
| 132 | CFLAGS="$CFLAGS $PTHREAD_CFLAGS" |
| 133 | save_LIBS="$LIBS" |
| 134 | LIBS="$PTHREAD_LIBS $LIBS" |
| 135 | AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS]) |
| 136 | AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes) |
| 137 | AC_MSG_RESULT($acx_pthread_ok) |
| 138 | if test x"$acx_pthread_ok" = xno; then |
| 139 | PTHREAD_LIBS="" |
| 140 | PTHREAD_CFLAGS="" |
| 141 | fi |
| 142 | LIBS="$save_LIBS" |
| 143 | CFLAGS="$save_CFLAGS" |
| 144 | fi |
| 145 | |
| 146 | # We must check for the threads library under a number of different |
| 147 | # names; the ordering is very important because some systems |
| 148 | # (e.g. DEC) have both -lpthread and -lpthreads, where one of the |
| 149 | # libraries is broken (non-POSIX). |
| 150 | |
| 151 | # Create a list of thread flags to try. Items starting with a "-" are |
| 152 | # C compiler flags, and other items are library names, except for "none" |
| 153 | # which indicates that we try without any flags at all, and "pthread-config" |
| 154 | # which is a program returning the flags for the Pth emulation library. |
| 155 | |
| 156 | acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config" |
| 157 | |
| 158 | # The ordering *is* (sometimes) important. Some notes on the |
| 159 | # individual items follow: |
| 160 | |
| 161 | # pthreads: AIX (must check this before -lpthread) |
| 162 | # none: in case threads are in libc; should be tried before -Kthread and |
| 163 | # other compiler flags to prevent continual compiler warnings |
| 164 | # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h) |
| 165 | # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able) |
| 166 | # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread) |
| 167 | # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads) |
| 168 | # -pthreads: Solaris/gcc |
| 169 | # -mthreads: Mingw32/gcc, Lynx/gcc |
| 170 | # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it |
| 171 | # doesn't hurt to check since this sometimes defines pthreads too; |
| 172 | # also defines -D_REENTRANT) |
| 173 | # pthread: Linux, etcetera |
| 174 | # --thread-safe: KAI C++ |
| 175 | # pthread-config: use pthread-config program (for GNU Pth library) |
| 176 | |
| 177 | case "${host_cpu}-${host_os}" in |
| 178 | *solaris*) |
| 179 | |
| 180 | # On Solaris (at least, for some versions), libc contains stubbed |
| 181 | # (non-functional) versions of the pthreads routines, so link-based |
| 182 | # tests will erroneously succeed. (We need to link with -pthread or |
| 183 | # -lpthread.) (The stubs are missing pthread_cleanup_push, or rather |
| 184 | # a function called by this macro, so we could check for that, but |
| 185 | # who knows whether they'll stub that too in a future libc.) So, |
| 186 | # we'll just look for -pthreads and -lpthread first: |
| 187 | |
| 188 | acx_pthread_flags="-pthread -pthreads pthread -mt $acx_pthread_flags" |
| 189 | ;; |
| 190 | esac |
| 191 | |
| 192 | if test x"$acx_pthread_ok" = xno; then |
| 193 | for flag in $acx_pthread_flags; do |
| 194 | |
| 195 | case $flag in |
| 196 | none) |
| 197 | AC_MSG_CHECKING([whether pthreads work without any flags]) |
| 198 | ;; |
| 199 | |
| 200 | -*) |
| 201 | AC_MSG_CHECKING([whether pthreads work with $flag]) |
| 202 | PTHREAD_CFLAGS="$flag" |
| 203 | ;; |
| 204 | |
| 205 | pthread-config) |
| 206 | AC_CHECK_PROG(acx_pthread_config, pthread-config, yes, no) |
| 207 | if test x"$acx_pthread_config" = xno; then continue; fi |
| 208 | PTHREAD_CFLAGS="`pthread-config --cflags`" |
| 209 | PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`" |
| 210 | ;; |
| 211 | |
| 212 | *) |
| 213 | AC_MSG_CHECKING([for the pthreads library -l$flag]) |
| 214 | PTHREAD_LIBS="-l$flag" |
| 215 | ;; |
| 216 | esac |
| 217 | |
| 218 | save_LIBS="$LIBS" |
| 219 | save_CFLAGS="$CFLAGS" |
| 220 | LIBS="$PTHREAD_LIBS $LIBS" |
| 221 | CFLAGS="$CFLAGS $PTHREAD_CFLAGS" |
| 222 | |
| 223 | # Check for various functions. We must include pthread.h, |
| 224 | # since some functions may be macros. (On the Sequent, we |
| 225 | # need a special flag -Kthread to make this header compile.) |
| 226 | # We check for pthread_join because it is in -lpthread on IRIX |
| 227 | # while pthread_create is in libc. We check for pthread_attr_init |
| 228 | # due to DEC craziness with -lpthreads. We check for |
| 229 | # pthread_cleanup_push because it is one of the few pthread |
| 230 | # functions on Solaris that doesn't have a non-functional libc stub. |
| 231 | # We try pthread_create on general principles. |
| 232 | AC_TRY_LINK([#include <pthread.h>], |
| 233 | [pthread_t th; pthread_join(th, 0); |
| 234 | pthread_attr_init(0); pthread_cleanup_push(0, 0); |
| 235 | pthread_create(0,0,0,0); pthread_cleanup_pop(0); ], |
| 236 | [acx_pthread_ok=yes]) |
| 237 | |
| 238 | LIBS="$save_LIBS" |
| 239 | CFLAGS="$save_CFLAGS" |
| 240 | |
| 241 | AC_MSG_RESULT($acx_pthread_ok) |
| 242 | if test "x$acx_pthread_ok" = xyes; then |
| 243 | break; |
| 244 | fi |
| 245 | |
| 246 | PTHREAD_LIBS="" |
| 247 | PTHREAD_CFLAGS="" |
| 248 | done |
| 249 | fi |
| 250 | |
| 251 | # Various other checks: |
| 252 | if test "x$acx_pthread_ok" = xyes; then |
| 253 | save_LIBS="$LIBS" |
| 254 | LIBS="$PTHREAD_LIBS $LIBS" |
| 255 | save_CFLAGS="$CFLAGS" |
| 256 | CFLAGS="$CFLAGS $PTHREAD_CFLAGS" |
| 257 | |
| 258 | # Detect AIX lossage: threads are created detached by default |
| 259 | # and the JOINABLE attribute has a nonstandard name (UNDETACHED). |
| 260 | AC_MSG_CHECKING([for joinable pthread attribute]) |
| 261 | AC_TRY_LINK([#include <pthread.h>], |
| 262 | [int attr=PTHREAD_CREATE_JOINABLE;], |
| 263 | ok=PTHREAD_CREATE_JOINABLE, ok=unknown) |
| 264 | if test x"$ok" = xunknown; then |
| 265 | AC_TRY_LINK([#include <pthread.h>], |
| 266 | [int attr=PTHREAD_CREATE_UNDETACHED;], |
| 267 | ok=PTHREAD_CREATE_UNDETACHED, ok=unknown) |
| 268 | fi |
| 269 | if test x"$ok" != xPTHREAD_CREATE_JOINABLE; then |
| 270 | AC_DEFINE(PTHREAD_CREATE_JOINABLE, $ok, |
| 271 | [Define to the necessary symbol if this constant |
| 272 | uses a non-standard name on your system.]) |
| 273 | fi |
| 274 | AC_MSG_RESULT(${ok}) |
| 275 | if test x"$ok" = xunknown; then |
| 276 | AC_MSG_WARN([we do not know how to create joinable pthreads]) |
| 277 | fi |
| 278 | |
| 279 | AC_MSG_CHECKING([if more special flags are required for pthreads]) |
| 280 | flag=no |
| 281 | case "${host_cpu}-${host_os}" in |
| 282 | *-aix* | *-freebsd* | *-darwin*) flag="-D_THREAD_SAFE";; |
| 283 | *solaris* | *-osf* | *-hpux*) flag="-D_REENTRANT";; |
| 284 | esac |
| 285 | AC_MSG_RESULT(${flag}) |
| 286 | if test "x$flag" != xno; then |
| 287 | PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS" |
| 288 | fi |
| 289 | |
| 290 | LIBS="$save_LIBS" |
| 291 | CFLAGS="$save_CFLAGS" |
| 292 | |
| 293 | # More AIX lossage: must compile with cc_r |
| 294 | AC_CHECK_PROG(PTHREAD_CC, cc_r, cc_r, ${CC}) |
| 295 | else |
| 296 | PTHREAD_CC="$CC" |
| 297 | fi |
| 298 | |
| 299 | AC_SUBST(PTHREAD_LIBS) |
| 300 | AC_SUBST(PTHREAD_CFLAGS) |
| 301 | AC_SUBST(PTHREAD_CC) |
| 302 | |
| 303 | # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: |
| 304 | if test x"$acx_pthread_ok" = xyes; then |
| 305 | ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1]) |
| 306 | : |
| 307 | else |
| 308 | acx_pthread_ok=no |
| 309 | $2 |
| 310 | fi |
| 311 | AC_LANG_RESTORE |
| 312 | ])dnl ACX_PTHREAD |