Annotation of sql/pgsql/libltdl/configure.in, revision 1.2
1.1 parser 1: dnl Process this file with autoconf to create configure.
2:
3: AC_INIT(ltdl.c)
4:
5: enable_ltdl_install=yes
6:
7: AM_INIT_AUTOMAKE(libltdl,1.0,-)
8: AM_CONFIG_HEADER(config_auto.h)
9: AM_MAINTAINER_MODE
10:
11: AC_PROG_CC
12: AC_C_CONST
13: AC_C_INLINE
14: AM_PROG_LIBTOOL
15: AC_SUBST(LIBTOOL_DEPS)
16:
17: AC_ARG_ENABLE(ltdl-install,
18: [ --enable-ltdl-install install libltdl])
19:
20: AM_CONDITIONAL(INSTALL_LTDL, test x"${enable_ltdl_install-no}" != xno)
21: AM_CONDITIONAL(CONVENIENCE_LTDL, test x"${enable_ltdl_convenience-no}" != xno)
22:
23: dnl Read the libtool configuration
24: rm -f conftest
1.2 ! paf 25: $LIBTOOL --config > conftest
1.1 parser 26: . ./conftest
27: rm -f conftest
28:
29: AC_CACHE_CHECK([which extension is used for shared libraries],
30: libltdl_cv_shlibext, [dnl
31: (
32: last=
33: for spec in $library_names_spec; do
34: last="$spec"
35: done
36: changequote(, )
37: echo "$last" | sed 's/\[.*\]//;s/^[^.]*//;s/\$.*$//;s/\.$//' > conftest
38: changequote([, ])
39: )
40: libltdl_cv_shlibext=`cat conftest`
41: rm -f conftest
42: ])
43: if test -n "$libltdl_cv_shlibext"; then
44: AC_DEFINE_UNQUOTED(LTDL_SHLIB_EXT, "$libltdl_cv_shlibext",
45: [Define to the extension used for shared libraries, say, ".so". ])
46: fi
47:
48: AC_CACHE_CHECK([which variable specifies run-time library path],
49: libltdl_cv_shlibpath_var, [libltdl_cv_shlibpath_var="$shlibpath_var"])
50: if test -n "$libltdl_cv_shlibpath_var"; then
51: AC_DEFINE_UNQUOTED(LTDL_SHLIBPATH_VAR, "$libltdl_cv_shlibpath_var",
52: [Define to the name of the environment variable that determines the dynamic library search path. ])
53: fi
54:
55: AC_CACHE_CHECK([for objdir],
56: libltdl_cv_objdir, [libltdl_cv_objdir="$objdir"])
57: test -z "$libltdl_cv_objdir" && libltdl_cv_objdir=".libs"
58: AC_DEFINE_UNQUOTED(LTDL_OBJDIR, "$libltdl_cv_objdir/",
59: [Define to the sub-directory in which libtool stores uninstalled libraries. ])
60:
61: AC_HEADER_STDC
62: AC_CHECK_HEADERS(malloc.h memory.h stdlib.h stdio.h ctype.h dlfcn.h dl.h dld.h)
63: AC_CHECK_HEADERS(string.h strings.h, break)
64: AC_CHECK_FUNCS(strchr index, break)
65: AC_CHECK_FUNCS(strrchr rindex, break)
66:
67: AC_CACHE_CHECK([whether libtool supports -dlopen/-dlpreopen],
68: libltdl_cv_preloaded_symbols, [dnl
69: if test -n "$global_symbol_pipe"; then
70: libltdl_cv_preloaded_symbols=yes
71: else
72: libltdl_cv_preloaded_symbols=no
73: fi
74: ])
75: if test x"$libltdl_cv_preloaded_symbols" = x"yes"; then
76: AC_DEFINE(HAVE_PRELOADED_SYMBOLS, 1,
77: [Define if libtool can extract symbol lists from object files. ])
78: fi
79:
80: LIBADD_DL=
81: AC_CHECK_LIB(dl, dlopen, [AC_DEFINE(HAVE_LIBDL, 1) LIBADD_DL="-ldl"],
82: [AC_CHECK_FUNC(dlopen, [AC_DEFINE(HAVE_LIBDL, 1)])])
83: AC_CHECK_FUNC(shl_load, [AC_DEFINE(HAVE_SHL_LOAD, 1)],
84: [AC_CHECK_LIB(dld, shl_load, [AC_DEFINE(HAVE_SHL_LOAD, 1) LIBADD_DL="$LIBADD_DL -ldld"])])
85: AC_CHECK_LIB(dld, dld_link, [AC_DEFINE(HAVE_DLD, 1)dnl
86: test "x$ac_cv_lib_dld_shl_load" = yes || LIBADD_DL="$LIBADD_DL -ldld"])
87: AC_SUBST(LIBADD_DL)
88:
89: if test "x$ac_cv_func_dlopen" = xyes || test "x$ac_cv_lib_dl_dlopen" = xyes; then
90: LIBS_SAVE="$LIBS"
91: LIBS="$LIBS $LIBADD_DL"
92: AC_CHECK_FUNCS(dlerror)
93: LIBS="$LIBS_SAVE"
94: fi
95:
96: dnl Check for command to grab the raw symbol name followed
97: dnl by C symbol name from nm.
98: AC_REQUIRE([AC_CANONICAL_HOST])dnl
99: AC_REQUIRE([AC_PROG_NM])dnl
100: # Check for command to grab the raw symbol name followed by C symbol from nm.
101: AC_MSG_CHECKING([command to parse $NM output])
102: AC_CACHE_VAL(ac_cv_sys_global_symbol_pipe,
103: [# These are sane defaults that work on at least a few old systems.
104: # {They come from Ultrix. What could be older than Ultrix?!! ;)}
105:
106: changequote(,)dnl
107: # Character class describing NM global symbol codes.
108: ac_symcode='[BCDEGRST]'
109:
110: # Regexp to match symbols that can be accessed directly from C.
111: ac_sympat='\([_A-Za-z][_A-Za-z0-9]*\)'
112:
113: # Transform the above into a raw symbol and a C symbol.
114: ac_symxfrm='\1 \2\3 \3'
115:
116: # Transform an extracted symbol line into a proper C declaration
117: ac_global_symbol_to_cdecl="sed -n -e 's/^. .* \(.*\)$/extern char \1;/p'"
118:
119: # Define system-specific variables.
120: case "$host_os" in
121: aix*)
122: ac_symcode='[BCDT]'
123: ;;
124: cygwin* | mingw*)
125: ac_symcode='[ABCDGISTW]'
126: ;;
127: hpux*)
128: ac_global_symbol_to_cdecl="sed -n -e 's/^T .* \(.*\)$/extern char \1();/p' -e 's/^. .* \(.*\)$/extern char \1;/p'"
129: ;;
130: irix*)
131: ac_symcode='[BCDEGRST]'
132: ;;
133: solaris*)
134: ac_symcode='[BDT]'
135: ;;
136: esac
137:
138: # If we're using GNU nm, then use its standard symbol codes.
139: if $NM -V 2>&1 | egrep '(GNU|with BFD)' > /dev/null; then
140: ac_symcode='[ABCDGISTW]'
141: fi
142: changequote([,])dnl
143:
144: # Try without a prefix undercore, then with it.
145: for ac_symprfx in "" "_"; do
146:
147: ac_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[ ]\($ac_symcode\)[ ][ ]*\($ac_symprfx\)$ac_sympat$/$ac_symxfrm/p'"
148:
149: # Check to see that the pipe works correctly.
150: ac_pipe_works=no
151: rm -f conftest.$ac_ext
152: cat > conftest.$ac_ext <<EOF
153: #ifdef __cplusplus
154: extern "C" {
155: #endif
156: char nm_test_var;
157: void nm_test_func(){}
158: #ifdef __cplusplus
159: }
160: #endif
161: int main(){nm_test_var='a';nm_test_func;return 0;}
162: EOF
163:
164: if AC_TRY_EVAL(ac_compile); then
165: # Now try to grab the symbols.
166: ac_nlist=conftest.nm
167:
168: if AC_TRY_EVAL(NM conftest.$ac_objext \| $ac_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then
169:
170: # Try sorting and uniquifying the output.
171: if sort "$ac_nlist" | uniq > "$ac_nlist"T; then
172: mv -f "$ac_nlist"T "$ac_nlist"
173: else
174: rm -f "$ac_nlist"T
175: fi
176:
177: # Make sure that we snagged all the symbols we need.
178: if egrep ' nm_test_var$' "$ac_nlist" >/dev/null; then
179: if egrep ' nm_test_func$' "$ac_nlist" >/dev/null; then
180: cat <<EOF > conftest.c
181: #ifdef __cplusplus
182: extern "C" {
183: #endif
184:
185: EOF
186: # Now generate the symbol file.
187: eval "$ac_global_symbol_to_cdecl"' < "$ac_nlist" >> conftest.c'
188:
189: cat <<EOF >> conftest.c
190: #if defined (__STDC__) && __STDC__
191: # define lt_ptr_t void *
192: #else
193: # define lt_ptr_t char *
194: # define const
195: #endif
196:
197: /* The mapping between symbol names and symbols. */
198: const struct {
199: const char *name;
200: lt_ptr_t address;
201: }
202: changequote(,)dnl
203: lt_preloaded_symbols[] =
204: changequote([,])dnl
205: {
206: EOF
207: sed 's/^. \(.*\) \(.*\)$/ {"\2", (lt_ptr_t) \&\2},/' < "$ac_nlist" >> conftest.c
208: cat <<\EOF >> conftest.c
209: {0, (lt_ptr_t) 0}
210: };
211:
212: #ifdef __cplusplus
213: }
214: #endif
215: EOF
216: # Now try linking the two files.
217: mv conftest.$ac_objext conftstm.$ac_objext
218: ac_save_LIBS="$LIBS"
219: ac_save_CFLAGS="$CFLAGS"
220: LIBS="conftstm.$ac_objext"
221: CFLAGS="$CFLAGS$no_builtin_flag"
222: if AC_TRY_EVAL(ac_link) && test -s conftest; then
223: ac_pipe_works=yes
224: else
225: echo "configure: failed program was:" >&AC_FD_CC
226: cat conftest.c >&AC_FD_CC
227: fi
228: LIBS="$ac_save_LIBS"
229: CFLAGS="$ac_save_CFLAGS"
230: else
231: echo "cannot find nm_test_func in $ac_nlist" >&AC_FD_CC
232: fi
233: else
234: echo "cannot find nm_test_var in $ac_nlist" >&AC_FD_CC
235: fi
236: else
237: echo "cannot run $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC
238: fi
239: else
240: echo "$progname: failed program was:" >&AC_FD_CC
241: cat conftest.c >&AC_FD_CC
242: fi
243: rm -rf conftest* conftst*
244:
245: # Do not use the global_symbol_pipe unless it works.
246: if test "$ac_pipe_works" = yes; then
247: if test x"$ac_symprfx" = x"_"; then
248: ac_cv_sys_symbol_underscore=yes
249: else
250: ac_cv_sys_symbol_underscore=no
251: fi
252: break
253: else
254: ac_cv_sys_global_symbol_pipe=
255: fi
256: done
257: ])
258:
259: ac_result=yes
260: if test -z "$ac_cv_sys_global_symbol_pipe"; then
261: ac_result=no
262: fi
263: AC_MSG_RESULT($ac_result)
264:
265: dnl does the compiler prefix global symbols with an underscore?
266: AC_MSG_CHECKING([for _ prefix in compiled symbols])
267: AC_CACHE_VAL(ac_cv_sys_symbol_underscore,
268: [ac_cv_sys_symbol_underscore=no
269: cat > conftest.$ac_ext <<EOF
270: void nm_test_func(){}
271: int main(){nm_test_func;return 0;}
272: EOF
273: if AC_TRY_EVAL(ac_compile); then
274: # Now try to grab the symbols.
275: ac_nlist=conftest.nm
276: if AC_TRY_EVAL(NM conftest.$ac_objext \| $ac_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then
277: # See whether the symbols have a leading underscore.
278: if egrep '^. _nm_test_func' "$ac_nlist" >/dev/null; then
279: ac_cv_sys_symbol_underscore=yes
280: else
281: if egrep '^. nm_test_func ' "$ac_nlist" >/dev/null; then
282: :
283: else
284: echo "configure: cannot find nm_test_func in $ac_nlist" >&AC_FD_CC
285: fi
286: fi
287: else
288: echo "configure: cannot run $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC
289: fi
290: else
291: echo "configure: failed program was:" >&AC_FD_CC
292: cat conftest.c >&AC_FD_CC
293: fi
294: rm -rf conftest*
295: ])
296: AC_MSG_RESULT($ac_cv_sys_symbol_underscore)
297:
298: if test x"$ac_cv_sys_symbol_underscore" = xyes; then
299: if test x"$ac_cv_func_dlopen" = xyes ||
300: test x"$ac_cv_lib_dl_dlopen" = xyes ; then
301: AC_CACHE_CHECK([whether we have to add an underscore for dlsym],
302: libltdl_cv_need_uscore, [dnl
303: AC_TRY_RUN([
304: #if HAVE_DLFCN_H
305: #include <dlfcn.h>
306: #endif
307:
308: #include <stdio.h>
309:
310: #ifdef RTLD_GLOBAL
311: # define LTDL_GLOBAL RTLD_GLOBAL
312: #else
313: # ifdef DL_GLOBAL
314: # define LTDL_GLOBAL DL_GLOBAL
315: # else
316: # define LTDL_GLOBAL 0
317: # endif
318: #endif
319:
320: /* We may have to define LTDL_LAZY_OR_NOW in the command line if we
321: find out it does not work in some platform. */
322: #ifndef LTDL_LAZY_OR_NOW
323: # ifdef RTLD_LAZY
324: # define LTDL_LAZY_OR_NOW RTLD_LAZY
325: # else
326: # ifdef DL_LAZY
327: # define LTDL_LAZY_OR_NOW DL_LAZY
328: # else
329: # ifdef RTLD_NOW
330: # define LTDL_LAZY_OR_NOW RTLD_NOW
331: # else
332: # ifdef DL_NOW
333: # define LTDL_LAZY_OR_NOW DL_NOW
334: # else
335: # define LTDL_LAZY_OR_NOW 0
336: # endif
337: # endif
338: # endif
339: # endif
340: #endif
341:
342: fnord() { int i=42;}
343: main() { void *self, *ptr1, *ptr2; self=dlopen(0,LTDL_GLOBAL|LTDL_LAZY_OR_NOW);
344: if(self) { ptr1=dlsym(self,"fnord"); ptr2=dlsym(self,"_fnord");
345: if(ptr1 && !ptr2) { dlclose(self); exit(0); } } exit(1); }
346: ], libltdl_cv_need_uscore=no, libltdl_cv_need_uscore=yes,
347: libltdl_cv_need_uscore=cross
348: )])
349: fi
350: fi
351:
352: if test x"$libltdl_cv_need_uscore" = xyes; then
353: AC_DEFINE(NEED_USCORE, 1,
354: [Define if dlsym() requires a leading underscode in symbol names. ])
355: fi
356:
357: dnl Output the makefile
358: AC_OUTPUT(Makefile)
359:
360: # Local Variables:
361: # mode:shell-script
362: # sh-indentation:2
363: # End:
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