Annotation of sql/pgsql/libltdl/configure.in, revision 1.1
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
! 25: ./libtool --config > conftest
! 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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