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[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [libmudflap/] [configure.ac] - Blame information for rev 859

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1 275 jeremybenn
# Process this file with autoconf to produce a configure script, like so:
2
# aclocal -I .. -I ../config && autoconf && autoheader && automake
3
 
4
AC_PREREQ(2.64)
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AC_INIT(libmudflap, 1.0)
6
AC_CONFIG_SRCDIR(mf-runtime.c)
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AC_CANONICAL_SYSTEM
8
ACX_NONCANONICAL_TARGET
9
 
10
AM_INIT_AUTOMAKE
11
 
12
AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
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AC_ARG_ENABLE(version-specific-runtime-libs,
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[  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
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[case "$enableval" in
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 yes) version_specific_libs=yes ;;
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 no)  version_specific_libs=no ;;
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 *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
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 esac],
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[version_specific_libs=no])
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AC_MSG_RESULT($version_specific_libs)
22
 
23
AM_MAINTAINER_MODE
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AC_EXEEXT
25
 
26
AM_ENABLE_MULTILIB(, ..)
27
 
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target_alias=${target_alias-$host_alias}
29
AC_SUBST(target_alias)
30
 
31
AC_CONFIG_HEADERS(config.h)
32
 
33
AC_LANG_C
34
# The same as in boehm-gc and libstdc++. Have to borrow it from there.
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# We must force CC to /not/ be precious variables; otherwise
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# the wrong, non-multilib-adjusted value will be used in multilibs.
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# As a side effect, we have to subst CFLAGS ourselves.
38
 
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m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
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m4_define([_AC_ARG_VAR_PRECIOUS],[])
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AC_PROG_CC
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m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
43
 
44
AC_SUBST(CFLAGS)
45
 
46
if test "x$GCC" != "xyes"; then
47
  AC_MSG_ERROR([libmudflap must be built with GCC])
48
fi
49
AC_PROG_CPP
50
 
51
# Some hosts don't have dlsym(RTLD_NEXT, "symbol") for use in
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# symbol interposition.  We disable shared libraries for these.
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AC_MSG_CHECKING([whether dlsym(RTLD_NEXT,...) is available])
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AC_TRY_COMPILE([
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#define _GNU_SOURCE
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#include 
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],
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[void *foo = dlsym (RTLD_NEXT, "exit");],
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[AC_MSG_RESULT(yes)],
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[AC_MSG_RESULT(no)
61
enable_shared=no])
62
 
63
AC_CHECK_HEADERS(stdint.h execinfo.h signal.h dlfcn.h dirent.h pwd.h grp.h \
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  netdb.h sys/ipc.h sys/sem.h sys/shm.h sys/wait.h ctype.h mntent.h \
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  sys/socket.h netinet/in.h arpa/inet.h dlfcn.h sys/mman.h)
66
 
67
AC_CHECK_FUNCS(backtrace backtrace_symbols gettimeofday signal)
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AC_CHECK_FUNCS(fopen64 fseeko64 ftello64 stat64 freopen64)
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AC_CHECK_FUNCS(setbuf setbuffer setlinebuf setvbuf)
70
AC_CHECK_FUNCS(strnlen memrchr strncpy memmem sethostname)
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AC_CHECK_FUNCS(__ctype_b_loc __ctype_tolower_loc __ctype_toupper_loc)
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AC_CHECK_FUNCS(getlogin cuserid getpwnam getpwuid getpwent getgrnam getgrgid getgrent)
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AC_CHECK_FUNCS(getlogin_r getpwnam_r getpwuid_r getgrnam_r getgrgid_r)
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AC_CHECK_FUNCS(getservent getservbyname getservbyport getaddrinfo gai_strerror)
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AC_CHECK_FUNCS(getprotoent getprotobyname getprotobynumber)
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AC_CHECK_FUNCS(getmntent setmntent addmntent)
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AC_CHECK_FUNCS(inet_ntoa mmap munmap)
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AC_CHECK_FUNCS(__libc_freeres)
79
 
80
AC_TRY_COMPILE([#include 
81
#include 
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#include ],[union semun foo;], [mf_have_semun=1], [mf_have_semun=0])
83
if test $mf_have_semun = 1
84
then
85
  AC_DEFINE(HAVE_UNION_SEMUN, 1, [union semun defined in sys/ipc.h or sys/sem.h])
86
fi
87
 
88
 
89
AC_MSG_CHECKING([for socklen_t in sys/socket.h])
90
AC_TRY_COMPILE([#define _POSIX_PII_SOCKET
91
#include 
92
#include ], [socklen_t x = 5;],
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  [AC_DEFINE(HAVE_SOCKLEN_T, 1, [Define it socklen_t typedef is in sys/socket.h.])
94
   AC_MSG_RESULT(yes)],
95
  [AC_MSG_RESULT(no)])
96
 
97
AC_LIBTOOL_DLOPEN
98
AM_PROG_LIBTOOL
99
AC_SUBST(enable_shared)
100
AC_SUBST(enable_static)
101
 
102
AC_CHECK_HEADER(stdint.h, [MF_HAVE_STDINT_H=1], [MF_HAVE_STDINT_H=0])
103
AC_SUBST(MF_HAVE_STDINT_H)
104
if test $MF_HAVE_STDINT_H = 1
105
then
106
   MF_HAVE_UINTPTR_T=1
107
else
108
   AC_TRY_COMPILE([#include ], [uintptr_t k = 0;],
109
        [MF_HAVE_UINTPTR_T=1], [MF_HAVE_UINTPTR_T=0])
110
fi
111
AC_SUBST(MF_HAVE_UINTPTR_T)
112
 
113
if test ! -d pth
114
then
115
  # libmudflapth objects are built in this subdirectory
116
  mkdir pth
117
fi
118
 
119
AC_CHECK_HEADERS(pthread.h)
120
 
121
AC_MSG_CHECKING([for thread model used by GCC])
122
target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
123
AC_MSG_RESULT([$target_thread_file])
124
 
125
# We only support posix threads, or no threads at all.
126
posix_threads=
127
case ${target_thread_file} in
128
  posix)
129
    posix_threads=yes
130
    ;;
131
  single)
132
    ;;
133
  *)
134
    echo "${target_thread_file} is an unsupported thread package" 1>&2
135
    exit 1
136
    ;;
137
esac
138
 
139
AM_CONDITIONAL(LIBMUDFLAPTH, [test "x$posix_threads" != "x"])
140
if test "x$posix_threads" != "x"
141
then
142
        build_libmudflapth=1
143
else
144
        build_libmudflapth=0
145
fi
146
AC_SUBST(build_libmudflapth)
147
 
148
AC_CHECK_LIB(dl, dlsym)
149
 
150
# Calculate toolexeclibdir
151
# Also toolexecdir, though it's only used in toolexeclibdir
152
case ${version_specific_libs} in
153
  yes)
154
    # Need the gcc compiler version to know where to install libraries
155
    # and header files if --enable-version-specific-runtime-libs option
156
    # is selected.
157
    toolexecdir='$(libdir)/gcc/$(target_alias)'
158
    toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
159
    ;;
160
  no)
161
    if test -n "$with_cross_host" &&
162
       test x"$with_cross_host" != x"no"; then
163
      # Install a library built with a cross compiler in tooldir, not libdir.
164
      toolexecdir='$(exec_prefix)/$(target_alias)'
165
      toolexeclibdir='$(toolexecdir)/lib'
166
    else
167
      toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
168
      toolexeclibdir='$(libdir)'
169
    fi
170
    multi_os_directory=`$CC -print-multi-os-directory`
171
    case $multi_os_directory in
172
      .) ;; # Avoid trailing /.
173
      *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
174
    esac
175
    ;;
176
esac
177
AC_SUBST(toolexecdir)
178
AC_SUBST(toolexeclibdir)
179
 
180
includedir=${toolexecdir}/include
181
AC_SUBST(includedir)
182
 
183
pthread_create_version='""'
184
if test "x$enable_shared" = "xyes" && test "x$posix_threads" != "x"; then
185
  # NB: don't check for -lpthread here, because then it would be
186
  # added to LIBS.  For the thread-unaware libmudflap.la, we don't
187
  # want it there.
188
 
189
  # glibc-related hacks.  dlsym() may pick the wrong version of
190
  # interposed functions like pthread_create on modern glibc.
191
  # We need to find the proper symbol version string, and use
192
  # the nonstandard dlvsym().
193
  AC_CHECK_FUNCS(dlvsym)
194
  AC_CHECK_TOOL(NM, nm)
195
  if test "x$ac_cv_have_dlvsym" != "x"; then
196
    # Try compiling a simple pthreads program.  Find the shared libraries it
197
    # ends up with.  Then use "nm" on those libraries to extract the
198
    # default symbol versioning suffix ("@@"), if any.  But that's tricky.
199
    # Rather, run nm on the resulting executable.  Unfortunately, autoconf
200
    # doesn't appear to have a macro that builds a test executable for
201
    # subsequent analysis ... so we do it by hand here.
202
    cat >> conftest.c << EOF
203
#include 
204
int main () { void *p = (void *) & pthread_create; return (int) p; }
205
EOF
206
    oldLIBS="$LIBS"
207
    LIBS="$LIBS -lpthread"
208
    pthread_create_version="\"\""
209
    AC_MSG_CHECKING(pthread_create symbol version)
210
    if eval $ac_link 2>&5 && test -s conftest${ac_exeext}; then
211
      version=`$NM conftest${ac_exeect} | grep 'pthread_create@@' | sed -e 's/^.*@@//'`
212
      if test "x$version" != "x"; then
213
        pthread_create_version="\"$version\""
214
      fi
215
    fi
216
    AC_MSG_RESULT($pthread_create_version)
217
    LIBS="$oldLIBS"
218
  fi
219
fi
220
AC_DEFINE_UNQUOTED(PTHREAD_CREATE_VERSION, $pthread_create_version, [pthread_create symbol version])
221
 
222
 
223
# Figure out whether the compiler supports "-ffunction-sections -fdata-sections",
224
# similarly to how libstdc++ does it
225
ac_test_CFLAGS="${CFLAGS+set}"
226
ac_save_CFLAGS="$CFLAGS"
227
 
228
# Check for -ffunction-sections -fdata-sections
229
AC_MSG_CHECKING([for gcc that supports -ffunction-sections -fdata-sections])
230
CFLAGS='-Werror -ffunction-sections -fdata-sections'
231
AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
232
if test "$ac_test_CFLAGS" = set; then
233
  CFLAGS="$ac_save_CFLAGS"
234
else
235
  # this is the suspicious part
236
  CFLAGS=""
237
fi
238
if test x"$ac_fdsections" = x"yes"; then
239
  SECTION_FLAGS='-ffunction-sections -fdata-sections'
240
fi
241
AC_MSG_RESULT($ac_fdsections)
242
AC_SUBST(SECTION_FLAGS)
243
 
244
 
245
# Check for the name of the symbol used for the entry point.
246
AC_CACHE_CHECK([for the name of the symbol used for the entry point],
247
  [mudflap_cv_entry_point], [
248
for name in _start __start unknown; do
249
  AC_LINK_IFELSE([AC_LANG_PROGRAM([extern char $name@<:@@:>@;], [$name@<:@0@:>@ = 0;])],
250
                 [break])
251
done
252
mudflap_cv_entry_point="$name"])
253
if test "$mudflap_cv_entry_point" = unknown; then
254
  AC_MSG_ERROR([none of the known symbol names works])
255
fi
256
AC_DEFINE_UNQUOTED([ENTRY_POINT], [$mudflap_cv_entry_point],
257
  [Define to the name of the symbol used for the entry point.])
258
 
259
 
260
if test ${multilib} = yes; then
261
  multilib_arg="--enable-multilib"
262
else
263
  multilib_arg=
264
fi
265
 
266
# See if we support thread-local storage.
267
GCC_CHECK_TLS
268
GCC_CHECK_EMUTLS
269
 
270
AC_CONFIG_FILES([Makefile testsuite/Makefile testsuite/mfconfig.exp])
271
AC_OUTPUT

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