AC_REQUIRE([AC_PROG_CC])dnl
AC_REQUIRE([AM_PROG_LD])dnl
AC_REQUIRE([AM_PROG_NM])dnl
+AC_REQUIRE([AM_SYS_NM_PARSE])dnl
+AC_REQUIRE([AM_SYS_SYMBOL_UNDERSCORE])dnl
AC_REQUIRE([AC_PROG_LN_S])dnl
dnl
# Always use our own libtool.
AC_SUBST(NM)
])
+# AM_SYS_NM_PARSE - Check for command ro grab the raw symbol name followed
+# by C symbol name from nm.
+AC_DEFUN(AM_SYS_NM_PARSE,
+[AC_REQUIRE([AC_CANONICAL_HOST])dnl
+AC_REQUIRE([AM_PROG_NM])dnl
+# Check for command to grab the raw symbol name followed by C symbol from nm.
+AC_MSG_CHECKING([command to parse $NM output])
+AC_CACHE_VAL(ac_cv_sys_global_symbol_pipe,
+[# These are sane defaults that work on at least a few old systems.
+# {They come from Ultrix. What could be older than Ultrix?!! ;)}
+
+changequote(,)dnl
+# Character class describing NM global symbol codes.
+ac_symcode='[BCDEGRSTU]'
+
+# Regexp to match symbols that can be accessed directly from C.
+ac_sympat='\([_A-Za-z][_A-Za-z0-9]*\)'
+
+# Transform the above into a raw symbol and a C symbol.
+ac_symxfrm='\1 \1'
+
+# Define system-specific variables.
+case "$host_os" in
+aix*)
+ ac_symcode='[BCDTU]'
+ ;;
+sunos* | cygwin32* | mingw32*)
+ ac_sympat='_\([_A-Za-z][_A-Za-z0-9]*\)'
+ ac_symxfrm='_\1 \1'
+ ;;
+irix*)
+ # Cannot use undefined symbols on IRIX because inlined functions mess us up.
+ ac_symcode='[BCDEGRST]'
+ ;;
+solaris*)
+ ac_symcode='[BDTU]'
+ ;;
+esac
+
+# If we're using GNU nm, then use its standard symbol codes.
+if $NM -V 2>&1 | egrep '(GNU|with BFD)' > /dev/null; then
+ ac_symcode='[ABCDGISTUW]'
+fi
+
+case "$host_os" in
+cygwin32* | mingw32*)
+ # We do not want undefined symbols on cygwin32. The user must
+ # arrange to define them via -l arguments.
+ ac_symcode='[ABCDGISTW]'
+ ;;
+esac
+changequote([,])dnl
+
+# Write the raw and C identifiers.
+ac_cv_sys_global_symbol_pipe="sed -n -e 's/^.* $ac_symcode $ac_sympat$/$ac_symxfrm/p'"
+
+# Check to see that the pipe works correctly.
+ac_pipe_works=no
+cat > conftest.$ac_ext <<EOF
+#ifdef __cplusplus
+extern "C" {
+#endif
+char nm_test_var;
+void nm_test_func(){}
+#ifdef __cplusplus
+}
+#endif
+int main(){nm_test_var='a';nm_test_func;return 0;}
+EOF
+if AC_TRY_EVAL(ac_compile); then
+ # Now try to grab the symbols.
+ ac_nlist=conftest.nm
+ if AC_TRY_EVAL(NM conftest.$ac_objext \| $ac_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then
+
+ # Try sorting and uniquifying the output.
+ if sort "$ac_nlist" | uniq > "$ac_nlist"T; then
+ mv -f "$ac_nlist"T "$ac_nlist"
+ ac_wcout=`wc "$ac_nlist" 2>/dev/null`
+changequote(,)dnl
+ ac_count=`echo "X$ac_wcout" | sed -e 's,^X,,' -e 's/^[ ]*\([0-9][0-9]*\).*$/\1/'`
+changequote([,])dnl
+ (test "$ac_count" -ge 0) 2>/dev/null || ac_count=-1
+ else
+ rm -f "$ac_nlist"T
+ ac_count=-1
+ fi
+
+ # Make sure that we snagged all the symbols we need.
+ if egrep ' nm_test_var$' "$ac_nlist" >/dev/null; then
+ if egrep ' nm_test_func$' "$ac_nlist" >/dev/null; then
+ cat <<EOF > conftest.c
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+EOF
+ # Now generate the symbol file.
+ sed 's/^.* \(.*\)$/extern char \1;/' < "$ac_nlist" >> conftest.c
+
+ cat <<EOF >> conftest.c
+#if defined (__STDC__) && __STDC__
+# define __ptr_t void *
+#else
+# define __ptr_t char *
+#endif
+
+/* The number of symbols in dld_preloaded_symbols, -1 if unsorted. */
+int dld_preloaded_symbol_count = $ac_count;
+
+/* The mapping between symbol names and symbols. */
+struct {
+ char *name;
+ __ptr_t address;
+}
+changequote(,)dnl
+dld_preloaded_symbols[] =
+changequote([,])dnl
+{
+EOF
+ sed 's/^\(.*\) \(.*\)$/ {"\1", (__ptr_t) \&\2},/' < "$ac_nlist" >> conftest.c
+ cat <<\EOF >> conftest.c
+ {0, (__ptr_t) 0}
+};
+
+#ifdef __cplusplus
+}
+#endif
+EOF
+ # Now try linking the two files.
+ mv conftest.$ac_objext conftestm.$ac_objext
+ ac_save_LIBS="$LIBS"
+ ac_save_CFLAGS="$CFLAGS"
+ LIBS="conftestm.$ac_objext"
+ CFLAGS="$CFLAGS$no_builtin_flag"
+ if AC_TRY_EVAL(ac_link) && test -s conftest; then
+ ac_pipe_works=yes
+ else
+ echo "configure: failed program was:" >&AC_FD_CC
+ cat conftest.c >&AC_FD_CC
+ fi
+ LIBS="$ac_save_LIBS"
+ CFLAGS="$ac_save_CFLAGS"
+ else
+ echo "cannot find nm_test_func in $ac_nlist" >&AC_FD_CC
+ fi
+ else
+ echo "cannot find nm_test_var in $ac_nlist" >&AC_FD_CC
+ fi
+ else
+ echo "cannot run $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC
+ fi
+else
+ echo "$progname: failed program was:" >&AC_FD_CC
+ cat conftest.c >&AC_FD_CC
+fi
+rm -rf conftest*
+
+# Do not use the global_symbol_pipe unless it works.
+test "$ac_pipe_works" = yes || ac_cv_sys_global_symbol_pipe=
+])
+
+ac_result=yes
+if test -z "$ac_cv_sys_global_symbol_pipe"; then
+ ac_result=no
+fi
+AC_MSG_RESULT($ac_result)
+])
+
# AM_SYS_LIBTOOL_CYGWIN32 - find tools needed on cygwin32
AC_DEFUN(AM_SYS_LIBTOOL_CYGWIN32,
[AC_CHECK_TOOL(DLLTOOL, dlltool, false)
AC_CHECK_TOOL(AS, as, false)
])
+
+# AM_SYS_SYMBOL_UNDERSCORE - does the compiler prefix global symbols
+# with an underscore?
+AC_DEFUN(AM_SYS_SYMBOL_UNDERSCORE,
+[AC_REQUIRE([AM_PROG_NM])dnl
+AC_REQUIRE([AM_SYS_NM_PARSE])dnl
+AC_MSG_CHECKING([for _ prefix in compiled symbols])
+AC_CACHE_VAL(ac_cv_sys_symbol_underscore,
+[ac_cv_sys_symbol_underscore=no
+cat > conftest.$ac_ext <<EOF
+void nm_test_func(){}
+int main(){nm_test_func;return 0;}
+EOF
+if AC_TRY_EVAL(ac_compile); then
+ # Now try to grab the symbols.
+ ac_nlist=conftest.nm
+ if AC_TRY_EVAL(NM conftest.$ac_objext \| $ac_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then
+ # See whether the symbols have a leading underscore.
+ if egrep '^_nm_test_func' "$ac_nlist" >/dev/null; then
+ ac_cv_sys_symbol_underscore=yes
+ else
+ if egrep '^nm_test_func ' "$ac_nlist" >/dev/null; then
+ :
+ else
+ echo "configure: cannot find nm_test_func in $ac_nlist" >&AC_FD_CC
+ fi
+ fi
+ else
+ echo "configure: cannot run $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC
+ fi
+else
+ echo "configure: failed program was:" >&AC_FD_CC
+ cat conftest.c >&AC_FD_CC
+fi
+rm -rf conftest*
+])
+AC_MSG_RESULT($ac_cv_sys_symbol_underscore)
+if test x$ac_cv_sys_symbol_underscore == xyes; then
+ AC_DEFINE(WITH_SYMBOL_UNDERSCORE,1,
+ [define if compiled symbols have a leading underscore])
+fi
+])
projects / thirdparty / libtool.git / commitdiff
