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Commit | Line | Data |
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6de9cd9a | 1 | # Process this file with autoconf to produce a configure script, like so: |
89040431 | 2 | # aclocal -I .. -I ../config && autoconf && autoheader && automake |
6de9cd9a | 3 | |
df58e648 | 4 | AC_PREREQ(2.64) |
076e5443 PB |
5 | AC_INIT(libmudflap, 1.0) |
6 | AC_CONFIG_SRCDIR(mf-runtime.c) | |
6de9cd9a | 7 | AC_CANONICAL_SYSTEM |
89040431 | 8 | ACX_NONCANONICAL_TARGET |
6de9cd9a | 9 | |
13917ae3 | 10 | AM_INIT_AUTOMAKE([no-dist]) |
076e5443 | 11 | |
42fcd7bb AJ |
12 | AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) |
13 | AC_ARG_ENABLE(version-specific-runtime-libs, | |
14 | [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ], | |
15 | [case "$enableval" in | |
16 | yes) version_specific_libs=yes ;; | |
17 | no) version_specific_libs=no ;; | |
18 | *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; | |
19 | esac], | |
20 | [version_specific_libs=no]) | |
21 | AC_MSG_RESULT($version_specific_libs) | |
22 | ||
6de9cd9a DN |
23 | AM_MAINTAINER_MODE |
24 | AC_EXEEXT | |
25 | ||
42fcd7bb AJ |
26 | AM_ENABLE_MULTILIB(, ..) |
27 | ||
124e22d4 | 28 | target_alias=${target_alias-$host_alias} |
6de9cd9a DN |
29 | AC_SUBST(target_alias) |
30 | ||
076e5443 | 31 | AC_CONFIG_HEADERS(config.h) |
6de9cd9a DN |
32 | |
33 | AC_LANG_C | |
42fcd7bb AJ |
34 | # The same as in boehm-gc and libstdc++. Have to borrow it from there. |
35 | # We must force CC to /not/ be precious variables; otherwise | |
36 | # the wrong, non-multilib-adjusted value will be used in multilibs. | |
37 | # As a side effect, we have to subst CFLAGS ourselves. | |
38 | ||
39 | m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) | |
40 | m4_define([_AC_ARG_VAR_PRECIOUS],[]) | |
6de9cd9a | 41 | AC_PROG_CC |
1b3b24c2 | 42 | m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) |
42fcd7bb AJ |
43 | |
44 | AC_SUBST(CFLAGS) | |
45 | ||
6de9cd9a DN |
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 | |
52 | # symbol interposition. We disable shared libraries for these. | |
53 | AC_MSG_CHECKING([whether dlsym(RTLD_NEXT,...) is available]) | |
54 | AC_TRY_COMPILE([ | |
55 | #define _GNU_SOURCE | |
56 | #include <dlfcn.h> | |
57 | ], | |
58 | [void *foo = dlsym (RTLD_NEXT, "exit");], | |
59 | [AC_MSG_RESULT(yes)], | |
60 | [AC_MSG_RESULT(no) | |
61 | enable_shared=no]) | |
62 | ||
66a5d3b1 | 63 | AC_CHECK_HEADERS(stdint.h execinfo.h signal.h dlfcn.h dirent.h pwd.h grp.h \ |
73407061 | 64 | netdb.h sys/ipc.h sys/sem.h sys/shm.h sys/wait.h ctype.h mntent.h \ |
ddfabf89 | 65 | sys/socket.h netinet/in.h arpa/inet.h dlfcn.h sys/mman.h) |
6de9cd9a | 66 | |
07c2f075 | 67 | AC_CHECK_FUNCS(backtrace backtrace_symbols gettimeofday signal) |
ddfabf89 FCE |
68 | AC_CHECK_FUNCS(fopen64 fseeko64 ftello64 stat64 freopen64) |
69 | AC_CHECK_FUNCS(setbuf setbuffer setlinebuf setvbuf) | |
7954e85c | 70 | AC_CHECK_FUNCS(strnlen memrchr strncpy memmem sethostname) |
dc88d66f | 71 | AC_CHECK_FUNCS(__ctype_b_loc __ctype_tolower_loc __ctype_toupper_loc) |
66a5d3b1 FCE |
72 | AC_CHECK_FUNCS(getlogin cuserid getpwnam getpwuid getpwent getgrnam getgrgid getgrent) |
73 | AC_CHECK_FUNCS(getlogin_r getpwnam_r getpwuid_r getgrnam_r getgrgid_r) | |
74 | AC_CHECK_FUNCS(getservent getservbyname getservbyport getaddrinfo gai_strerror) | |
07c2f075 FCE |
75 | AC_CHECK_FUNCS(getprotoent getprotobyname getprotobynumber) |
76 | AC_CHECK_FUNCS(getmntent setmntent addmntent) | |
ddfabf89 | 77 | AC_CHECK_FUNCS(inet_ntoa mmap munmap) |
a548d7b7 | 78 | AC_CHECK_FUNCS(__libc_freeres) |
66a5d3b1 | 79 | |
6de9cd9a DN |
80 | AC_TRY_COMPILE([#include <sys/types.h> |
81 | #include <sys/ipc.h> | |
82 | #include <sys/sem.h>],[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 | |
42fcd7bb | 91 | #include <sys/types.h> |
6de9cd9a DN |
92 | #include <sys/socket.h>], [socklen_t x = 5;], |
93 | [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 $MF_HAVE_STDINT_H = 1 | |
105 | then | |
106 | MF_HAVE_UINTPTR_T=1 | |
107 | else | |
108 | AC_TRY_COMPILE([#include <sys/types.h>], [uintptr_t k = 0;], | |
42fcd7bb | 109 | [MF_HAVE_UINTPTR_T=1], [MF_HAVE_UINTPTR_T=0]) |
6de9cd9a DN |
110 | fi |
111 | AC_SUBST(MF_HAVE_UINTPTR_T) | |
112 | ||
113 | if test ! -d pth | |
114 | then | |
115 | # libmudflapth objects are built in this subdirectory | |
116 | mkdir pth | |
117 | fi | |
118 | ||
cc6ac522 JW |
119 | AC_CHECK_HEADERS(pthread.h) |
120 | ||
121 | AC_MSG_CHECKING([for thread model used by GCC]) | |
122 | target_thread_file=`$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" | |
7954e85c FCE |
141 | then |
142 | build_libmudflapth=1 | |
143 | else | |
144 | build_libmudflapth=0 | |
145 | fi | |
146 | AC_SUBST(build_libmudflapth) | |
6de9cd9a DN |
147 | |
148 | AC_CHECK_LIB(dl, dlsym) | |
149 | ||
42fcd7bb AJ |
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/$(target_alias)' | |
fd0811ef | 158 | toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' |
42fcd7bb AJ |
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/$multi_os_directory ;; | |
174 | esac | |
175 | ;; | |
176 | esac | |
177 | AC_SUBST(toolexecdir) | |
178 | AC_SUBST(toolexeclibdir) | |
179 | ||
89040431 FCE |
180 | includedir=${toolexecdir}/include |
181 | AC_SUBST(includedir) | |
182 | ||
cc6ac522 JW |
183 | pthread_create_version='""' |
184 | if test "x$enable_shared" = "xyes" && test "x$posix_threads" != "x"; then | |
6de9cd9a DN |
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) | |
7954e85c | 195 | if test "x$ac_cv_have_dlvsym" != "x"; then |
6de9cd9a DN |
196 | # Try compiling a simple pthreads program. Find the shared libraries it |
197 | # ends up with. Then use "nm" on those libraries to extract the | |
198 | # default symbol versioning suffix ("@@"), if any. But that's tricky. | |
199 | # Rather, run nm on the resulting executable. Unfortunately, autoconf | |
200 | # doesn't appear to have a macro that builds a test executable for | |
42fcd7bb | 201 | # subsequent analysis ... so we do it by hand here. |
6de9cd9a DN |
202 | cat >> conftest.c << EOF |
203 | #include <pthread.h> | |
204 | int main () { void *p = (void *) & pthread_create; return (int) p; } | |
205 | EOF | |
206 | oldLIBS="$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 | |
42fcd7bb | 220 | AC_DEFINE_UNQUOTED(PTHREAD_CREATE_VERSION, $pthread_create_version, [pthread_create symbol version]) |
6de9cd9a | 221 | |
7954e85c FCE |
222 | |
223 | # Figure out whether the compiler supports "-ffunction-sections -fdata-sections", | |
224 | # similarly to how libstdc++ does it | |
225 | ac_test_CFLAGS="${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 | ||
7741b451 MR |
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 | |
063e53d6 | 249 | AC_LINK_IFELSE([AC_LANG_PROGRAM([extern char $name@<:@@:>@;], [$name@<:@0@:>@ = 0;])], |
7741b451 MR |
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 | ||
42fcd7bb AJ |
260 | if test ${multilib} = yes; then |
261 | multilib_arg="--enable-multilib" | |
262 | else | |
263 | multilib_arg= | |
264 | fi | |
6de9cd9a | 265 | |
7544a87f | 266 | # See if we support thread-local storage. |
e1e73e8d | 267 | GCC_CHECK_TLS |
5cf9cc96 | 268 | GCC_CHECK_EMUTLS |
7544a87f | 269 | |
1330529e | 270 | AC_CONFIG_FILES([Makefile testsuite/Makefile testsuite/mfconfig.exp]) |
076e5443 | 271 | AC_OUTPUT |