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Commit | Line | Data |
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6de9cd9a DN |
1 | # Process this file with autoconf to produce a configure script, like so: |
2 | # aclocal && autoconf && autoheader && automake | |
3 | ||
076e5443 PB |
4 | AC_PREREQ(2.59) |
5 | AC_INIT(libmudflap, 1.0) | |
6 | AC_CONFIG_SRCDIR(mf-runtime.c) | |
6de9cd9a | 7 | AC_CANONICAL_SYSTEM |
6de9cd9a | 8 | |
076e5443 PB |
9 | AM_INIT_AUTOMAKE |
10 | ||
42fcd7bb AJ |
11 | AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) |
12 | AC_ARG_ENABLE(version-specific-runtime-libs, | |
13 | [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ], | |
14 | [case "$enableval" in | |
15 | yes) version_specific_libs=yes ;; | |
16 | no) version_specific_libs=no ;; | |
17 | *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; | |
18 | esac], | |
19 | [version_specific_libs=no]) | |
20 | AC_MSG_RESULT($version_specific_libs) | |
21 | ||
6de9cd9a DN |
22 | AM_MAINTAINER_MODE |
23 | AC_EXEEXT | |
24 | ||
42fcd7bb AJ |
25 | AM_ENABLE_MULTILIB(, ..) |
26 | ||
124e22d4 | 27 | target_alias=${target_alias-$host_alias} |
6de9cd9a DN |
28 | AC_SUBST(target_alias) |
29 | ||
076e5443 | 30 | AC_CONFIG_HEADERS(config.h) |
6de9cd9a DN |
31 | |
32 | AC_LANG_C | |
42fcd7bb AJ |
33 | # The same as in boehm-gc and libstdc++. Have to borrow it from there. |
34 | # We must force CC to /not/ be precious variables; otherwise | |
35 | # the wrong, non-multilib-adjusted value will be used in multilibs. | |
36 | # As a side effect, we have to subst CFLAGS ourselves. | |
37 | ||
38 | m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) | |
39 | m4_define([_AC_ARG_VAR_PRECIOUS],[]) | |
6de9cd9a | 40 | AC_PROG_CC |
42fcd7bb AJ |
41 | m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) |
42 | ||
43 | AC_SUBST(CFLAGS) | |
44 | ||
6de9cd9a DN |
45 | if test "x$GCC" != "xyes"; then |
46 | AC_MSG_ERROR([libmudflap must be built with GCC]) | |
47 | fi | |
48 | AC_PROG_CPP | |
49 | ||
50 | # Some hosts don't have dlsym(RTLD_NEXT, "symbol") for use in | |
51 | # symbol interposition. We disable shared libraries for these. | |
52 | AC_MSG_CHECKING([whether dlsym(RTLD_NEXT,...) is available]) | |
53 | AC_TRY_COMPILE([ | |
54 | #define _GNU_SOURCE | |
55 | #include <dlfcn.h> | |
56 | ], | |
57 | [void *foo = dlsym (RTLD_NEXT, "exit");], | |
58 | [AC_MSG_RESULT(yes)], | |
59 | [AC_MSG_RESULT(no) | |
60 | enable_shared=no]) | |
61 | ||
66a5d3b1 | 62 | AC_CHECK_HEADERS(stdint.h execinfo.h signal.h dlfcn.h dirent.h pwd.h grp.h \ |
73407061 | 63 | netdb.h sys/ipc.h sys/sem.h sys/shm.h sys/wait.h ctype.h mntent.h \ |
ddfabf89 | 64 | sys/socket.h netinet/in.h arpa/inet.h dlfcn.h sys/mman.h) |
6de9cd9a | 65 | |
07c2f075 | 66 | AC_CHECK_FUNCS(backtrace backtrace_symbols gettimeofday signal) |
ddfabf89 FCE |
67 | AC_CHECK_FUNCS(fopen64 fseeko64 ftello64 stat64 freopen64) |
68 | AC_CHECK_FUNCS(setbuf setbuffer setlinebuf setvbuf) | |
7954e85c | 69 | AC_CHECK_FUNCS(strnlen memrchr strncpy memmem sethostname) |
dc88d66f | 70 | AC_CHECK_FUNCS(__ctype_b_loc __ctype_tolower_loc __ctype_toupper_loc) |
66a5d3b1 FCE |
71 | AC_CHECK_FUNCS(getlogin cuserid getpwnam getpwuid getpwent getgrnam getgrgid getgrent) |
72 | AC_CHECK_FUNCS(getlogin_r getpwnam_r getpwuid_r getgrnam_r getgrgid_r) | |
73 | AC_CHECK_FUNCS(getservent getservbyname getservbyport getaddrinfo gai_strerror) | |
07c2f075 FCE |
74 | AC_CHECK_FUNCS(getprotoent getprotobyname getprotobynumber) |
75 | AC_CHECK_FUNCS(getmntent setmntent addmntent) | |
ddfabf89 | 76 | AC_CHECK_FUNCS(inet_ntoa mmap munmap) |
66a5d3b1 | 77 | |
6de9cd9a DN |
78 | AC_TRY_COMPILE([#include <sys/types.h> |
79 | #include <sys/ipc.h> | |
80 | #include <sys/sem.h>],[union semun foo;], [mf_have_semun=1], [mf_have_semun=0]) | |
81 | if test $mf_have_semun = 1 | |
82 | then | |
83 | AC_DEFINE(HAVE_UNION_SEMUN, 1, [union semun defined in sys/ipc.h or sys/sem.h]) | |
84 | fi | |
85 | ||
86 | ||
87 | AC_MSG_CHECKING([for socklen_t in sys/socket.h]) | |
88 | AC_TRY_COMPILE([#define _POSIX_PII_SOCKET | |
42fcd7bb | 89 | #include <sys/types.h> |
6de9cd9a DN |
90 | #include <sys/socket.h>], [socklen_t x = 5;], |
91 | [AC_DEFINE(HAVE_SOCKLEN_T, 1, [Define it socklen_t typedef is in sys/socket.h.]) | |
92 | AC_MSG_RESULT(yes)], | |
93 | [AC_MSG_RESULT(no)]) | |
94 | ||
95 | AC_LIBTOOL_DLOPEN | |
96 | AM_PROG_LIBTOOL | |
97 | AC_SUBST(enable_shared) | |
98 | AC_SUBST(enable_static) | |
99 | ||
100 | AC_CHECK_HEADER(stdint.h, [MF_HAVE_STDINT_H=1], [MF_HAVE_STDINT_H=0]) | |
101 | AC_SUBST(MF_HAVE_STDINT_H) | |
102 | if test $MF_HAVE_STDINT_H = 1 | |
103 | then | |
104 | MF_HAVE_UINTPTR_T=1 | |
105 | else | |
106 | AC_TRY_COMPILE([#include <sys/types.h>], [uintptr_t k = 0;], | |
42fcd7bb | 107 | [MF_HAVE_UINTPTR_T=1], [MF_HAVE_UINTPTR_T=0]) |
6de9cd9a DN |
108 | fi |
109 | AC_SUBST(MF_HAVE_UINTPTR_T) | |
110 | ||
111 | if test ! -d pth | |
112 | then | |
113 | # libmudflapth objects are built in this subdirectory | |
114 | mkdir pth | |
115 | fi | |
116 | ||
cc6ac522 JW |
117 | AC_CHECK_HEADERS(pthread.h) |
118 | ||
119 | AC_MSG_CHECKING([for thread model used by GCC]) | |
120 | target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'` | |
121 | AC_MSG_RESULT([$target_thread_file]) | |
122 | ||
123 | # We only support posix threads, or no threads at all. | |
124 | posix_threads= | |
125 | case ${target_thread_file} in | |
126 | posix) | |
127 | posix_threads=yes | |
128 | ;; | |
129 | single) | |
130 | ;; | |
131 | *) | |
132 | echo "${target_thread_file} is an unsupported thread package" 1>&2 | |
133 | exit 1 | |
134 | ;; | |
135 | esac | |
136 | ||
137 | AM_CONDITIONAL(LIBMUDFLAPTH, [test "x$posix_threads" != "x"]) | |
138 | if test "x$posix_threads" != "x" | |
7954e85c FCE |
139 | then |
140 | build_libmudflapth=1 | |
141 | else | |
142 | build_libmudflapth=0 | |
143 | fi | |
144 | AC_SUBST(build_libmudflapth) | |
6de9cd9a DN |
145 | |
146 | AC_CHECK_LIB(dl, dlsym) | |
147 | ||
42fcd7bb AJ |
148 | # Calculate toolexeclibdir |
149 | # Also toolexecdir, though it's only used in toolexeclibdir | |
150 | case ${version_specific_libs} in | |
151 | yes) | |
152 | # Need the gcc compiler version to know where to install libraries | |
153 | # and header files if --enable-version-specific-runtime-libs option | |
154 | # is selected. | |
155 | toolexecdir='$(libdir)/gcc/$(target_alias)' | |
fd0811ef | 156 | toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' |
42fcd7bb AJ |
157 | ;; |
158 | no) | |
159 | if test -n "$with_cross_host" && | |
160 | test x"$with_cross_host" != x"no"; then | |
161 | # Install a library built with a cross compiler in tooldir, not libdir. | |
162 | toolexecdir='$(exec_prefix)/$(target_alias)' | |
163 | toolexeclibdir='$(toolexecdir)/lib' | |
164 | else | |
165 | toolexecdir='$(libdir)/gcc-lib/$(target_alias)' | |
166 | toolexeclibdir='$(libdir)' | |
167 | fi | |
168 | multi_os_directory=`$CC -print-multi-os-directory` | |
169 | case $multi_os_directory in | |
170 | .) ;; # Avoid trailing /. | |
171 | *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; | |
172 | esac | |
173 | ;; | |
174 | esac | |
175 | AC_SUBST(toolexecdir) | |
176 | AC_SUBST(toolexeclibdir) | |
177 | ||
cc6ac522 JW |
178 | pthread_create_version='""' |
179 | if test "x$enable_shared" = "xyes" && test "x$posix_threads" != "x"; then | |
6de9cd9a DN |
180 | # NB: don't check for -lpthread here, because then it would be |
181 | # added to LIBS. For the thread-unaware libmudflap.la, we don't | |
182 | # want it there. | |
183 | ||
184 | # glibc-related hacks. dlsym() may pick the wrong version of | |
185 | # interposed functions like pthread_create on modern glibc. | |
186 | # We need to find the proper symbol version string, and use | |
187 | # the nonstandard dlvsym(). | |
188 | AC_CHECK_FUNCS(dlvsym) | |
189 | AC_CHECK_TOOL(NM, nm) | |
7954e85c | 190 | if test "x$ac_cv_have_dlvsym" != "x"; then |
6de9cd9a DN |
191 | # Try compiling a simple pthreads program. Find the shared libraries it |
192 | # ends up with. Then use "nm" on those libraries to extract the | |
193 | # default symbol versioning suffix ("@@"), if any. But that's tricky. | |
194 | # Rather, run nm on the resulting executable. Unfortunately, autoconf | |
195 | # doesn't appear to have a macro that builds a test executable for | |
42fcd7bb | 196 | # subsequent analysis ... so we do it by hand here. |
6de9cd9a DN |
197 | cat >> conftest.c << EOF |
198 | #include <pthread.h> | |
199 | int main () { void *p = (void *) & pthread_create; return (int) p; } | |
200 | EOF | |
201 | oldLIBS="$LIBS" | |
202 | LIBS="$LIBS -lpthread" | |
203 | pthread_create_version="\"\"" | |
204 | AC_MSG_CHECKING(pthread_create symbol version) | |
205 | if eval $ac_link 2>&5 && test -s conftest${ac_exeext}; then | |
206 | version=`$NM conftest${ac_exeect} | grep 'pthread_create@@' | sed -e 's/^.*@@//'` | |
207 | if test "x$version" != "x"; then | |
208 | pthread_create_version="\"$version\"" | |
209 | fi | |
210 | fi | |
211 | AC_MSG_RESULT($pthread_create_version) | |
212 | LIBS="$oldLIBS" | |
213 | fi | |
214 | fi | |
42fcd7bb | 215 | AC_DEFINE_UNQUOTED(PTHREAD_CREATE_VERSION, $pthread_create_version, [pthread_create symbol version]) |
6de9cd9a | 216 | |
7954e85c FCE |
217 | |
218 | # Figure out whether the compiler supports "-ffunction-sections -fdata-sections", | |
219 | # similarly to how libstdc++ does it | |
220 | ac_test_CFLAGS="${CFLAGS+set}" | |
221 | ac_save_CFLAGS="$CFLAGS" | |
222 | ||
223 | # Check for -ffunction-sections -fdata-sections | |
224 | AC_MSG_CHECKING([for gcc that supports -ffunction-sections -fdata-sections]) | |
225 | CFLAGS='-Werror -ffunction-sections -fdata-sections' | |
226 | AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no]) | |
227 | if test "$ac_test_CFLAGS" = set; then | |
228 | CFLAGS="$ac_save_CFLAGS" | |
229 | else | |
230 | # this is the suspicious part | |
231 | CFLAGS="" | |
232 | fi | |
233 | if test x"$ac_fdsections" = x"yes"; then | |
234 | SECTION_FLAGS='-ffunction-sections -fdata-sections' | |
235 | fi | |
236 | AC_MSG_RESULT($ac_fdsections) | |
237 | AC_SUBST(SECTION_FLAGS) | |
238 | ||
239 | ||
7741b451 MR |
240 | # Check for the name of the symbol used for the entry point. |
241 | AC_CACHE_CHECK([for the name of the symbol used for the entry point], | |
242 | [mudflap_cv_entry_point], [ | |
243 | for name in _start __start unknown; do | |
063e53d6 | 244 | AC_LINK_IFELSE([AC_LANG_PROGRAM([extern char $name@<:@@:>@;], [$name@<:@0@:>@ = 0;])], |
7741b451 MR |
245 | [break]) |
246 | done | |
247 | mudflap_cv_entry_point="$name"]) | |
248 | if test "$mudflap_cv_entry_point" = unknown; then | |
249 | AC_MSG_ERROR([none of the known symbol names works]) | |
250 | fi | |
251 | AC_DEFINE_UNQUOTED([ENTRY_POINT], [$mudflap_cv_entry_point], | |
252 | [Define to the name of the symbol used for the entry point.]) | |
253 | ||
254 | ||
42fcd7bb AJ |
255 | if test ${multilib} = yes; then |
256 | multilib_arg="--enable-multilib" | |
257 | else | |
258 | multilib_arg= | |
259 | fi | |
6de9cd9a | 260 | |
7544a87f | 261 | # See if we support thread-local storage. |
e1e73e8d | 262 | GCC_CHECK_TLS |
7544a87f | 263 | |
1330529e | 264 | AC_CONFIG_FILES([Makefile testsuite/Makefile testsuite/mfconfig.exp]) |
076e5443 | 265 | AC_OUTPUT |