libgcobol: Check if the target needs libm.

Use the libtool config check and $(LIBM).

libgcobol/ChangeLog:

	* Makefile.am: Use $(LIBM) to add the math lib when
	it is needed.
	* Makefile.in: Regenerate.
	* configure: Regenerate.
	* configure.ac: Check if the target wants libm.

Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>

4 files changed, 148 insertions, 4 deletions

diff --git a/libgcobol/Makefile.am b/libgcobol/Makefile.am
index cafb733..4521742 100644
--- a/libgcobol/Makefile.am
+++ b/libgcobol/Makefile.am
@@ -48,7 +48,7 @@ libgcobol_la_LINK = $(LIBTOOL) --mode=link --tag=CXX $(CXX)	\
 		-Wc,-shared-libgcc				\
 		-version-info $(LIBGCOBOL_VERSION)		\
 		-lstdc++					\
-		$(LTLDFLAGS) $(LTLIBICONV)
+		$(LTLDFLAGS) $(LTLIBICONV) $(LIBM)
 
 WARN_CFLAGS = -W -Wall -Wwrite-strings
 
diff --git a/libgcobol/Makefile.in b/libgcobol/Makefile.in
index c4a562a..0f0d9b6 100644
--- a/libgcobol/Makefile.in
+++ b/libgcobol/Makefile.in
@@ -305,6 +305,7 @@ LD = @LD@
 LDFLAGS = @LDFLAGS@
 LIBGCOBOL_VERSION = @LIBGCOBOL_VERSION@
 LIBICONV = @LIBICONV@
+LIBM = @LIBM@
 LIBOBJS = @LIBOBJS@
 LIBS = @LIBS@
 LIBTOOL = @LIBTOOL@
@@ -428,7 +429,7 @@ libgcobol_la_LINK = $(LIBTOOL) --mode=link --tag=CXX $(CXX)	\
 		-Wc,-shared-libgcc				\
 		-version-info $(LIBGCOBOL_VERSION)		\
 		-lstdc++					\
-		$(LTLDFLAGS) $(LTLIBICONV)
+		$(LTLDFLAGS) $(LTLIBICONV) $(LIBM)
 
 WARN_CFLAGS = -W -Wall -Wwrite-strings
 AM_CXXFLAGS = $(CXXFLAGS_FOR_TARGET)
diff --git a/libgcobol/configure b/libgcobol/configure
index e12b72e..e7b3b83 100755
--- a/libgcobol/configure
+++ b/libgcobol/configure
@@ -646,6 +646,7 @@ enable_static
 enable_shared
 ENABLE_DARWIN_AT_RPATH_FALSE
 ENABLE_DARWIN_AT_RPATH_TRUE
+LIBM
 CXXCPP
 OTOOL64
 OTOOL
@@ -12908,7 +12909,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 12911 "configure"
+#line 12912 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -13014,7 +13015,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 13017 "configure"
+#line 13018 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -16348,6 +16349,147 @@ enable_dlopen=yes
 
 
 
+LIBM=
+case $host in
+*-*-beos* | *-*-cegcc* | *-*-cygwin* | *-*-haiku* | *-*-pw32* | *-*-darwin*)
+  # These system don't have libm, or don't need it
+  ;;
+*-ncr-sysv4.3*)
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for _mwvalidcheckl in -lmw" >&5
+$as_echo_n "checking for _mwvalidcheckl in -lmw... " >&6; }
+if ${ac_cv_lib_mw__mwvalidcheckl+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lmw  $LIBS"
+if test x$gcc_no_link = xyes; then
+  as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+fi
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char _mwvalidcheckl ();
+int
+main ()
+{
+return _mwvalidcheckl ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_mw__mwvalidcheckl=yes
+else
+  ac_cv_lib_mw__mwvalidcheckl=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_mw__mwvalidcheckl" >&5
+$as_echo "$ac_cv_lib_mw__mwvalidcheckl" >&6; }
+if test "x$ac_cv_lib_mw__mwvalidcheckl" = xyes; then :
+  LIBM="-lmw"
+fi
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for cos in -lm" >&5
+$as_echo_n "checking for cos in -lm... " >&6; }
+if ${ac_cv_lib_m_cos+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+if test x$gcc_no_link = xyes; then
+  as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+fi
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char cos ();
+int
+main ()
+{
+return cos ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_cos=yes
+else
+  ac_cv_lib_m_cos=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_cos" >&5
+$as_echo "$ac_cv_lib_m_cos" >&6; }
+if test "x$ac_cv_lib_m_cos" = xyes; then :
+  LIBM="$LIBM -lm"
+fi
+
+  ;;
+*)
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for cos in -lm" >&5
+$as_echo_n "checking for cos in -lm... " >&6; }
+if ${ac_cv_lib_m_cos+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+if test x$gcc_no_link = xyes; then
+  as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+fi
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char cos ();
+int
+main ()
+{
+return cos ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_cos=yes
+else
+  ac_cv_lib_m_cos=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_cos" >&5
+$as_echo "$ac_cv_lib_m_cos" >&6; }
+if test "x$ac_cv_lib_m_cos" = xyes; then :
+  LIBM="-lm"
+fi
+
+  ;;
+esac
+
+
 
  if test x$enable_darwin_at_rpath = xyes; then
   ENABLE_DARWIN_AT_RPATH_TRUE=
diff --git a/libgcobol/configure.ac b/libgcobol/configure.ac
index 34c0235..6b287a1 100644
--- a/libgcobol/configure.ac
+++ b/libgcobol/configure.ac
@@ -209,6 +209,7 @@ AM_PROG_LIBTOOL
 LT_INIT
 
 AC_LIBTOOL_DLOPEN
+LT_LIB_M
 
 AM_CONDITIONAL([ENABLE_DARWIN_AT_RPATH], [test x$enable_darwin_at_rpath = xyes])