[Xen-changelog] [xen-unstable] libxl: kill the need for checking and linking to libm

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Dario Faggioli <raistlin@xxxxxxxx>
# Date 1343234363 -3600
# Node ID be2ca8280da9709248d606c057afe27a46117943
# Parent  38dbecf592f7a2a9e01c1f0e542e42b63e2ef281
libxl: kill the need for checking and linking to libm

Which was introduced in 7b0dc7f3ddfe. This is because the NUMA
placement heuristic does not need FP arith anymore.

As usual when changing configure.ac, remember to rerun autoconf
after applying this change.

Signed-off-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>
Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Committed-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---


diff -r 38dbecf592f7 -r be2ca8280da9 tools/config.h.in
--- a/tools/config.h.in Wed Jul 25 17:39:22 2012 +0100
+++ b/tools/config.h.in Wed Jul 25 17:39:23 2012 +0100
@@ -6,9 +6,6 @@
 /* Define to 1 if you have the `crypto' library (-lcrypto). */
 #undef HAVE_LIBCRYPTO
 
-/* Define to 1 if you have the `m' library (-lm). */
-#undef HAVE_LIBM
-
 /* Define to 1 if you have the `yajl' library (-lyajl). */
 #undef HAVE_LIBYAJL
 
diff -r 38dbecf592f7 -r be2ca8280da9 tools/configure
--- a/tools/configure   Wed Jul 25 17:39:22 2012 +0100
+++ b/tools/configure   Wed Jul 25 17:39:23 2012 +0100
@@ -6336,53 +6336,6 @@ else
 fi
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for isnan in -lm" >&5
-$as_echo_n "checking for isnan in -lm... " >&6; }
-if test "${ac_cv_lib_m_isnan+set}" = set; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lm  $LIBS"
-cat confdefs.h - <<_ACEOF >conftest.$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 isnan ();
-int
-main ()
-{
-return isnan ();
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_lib_m_isnan=yes
-else
-  ac_cv_lib_m_isnan=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_isnan" >&5
-$as_echo "$ac_cv_lib_m_isnan" >&6; }
-if test "x$ac_cv_lib_m_isnan" = x""yes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_LIBM 1
-_ACEOF
-
-  LIBS="-lm $LIBS"
-
-else
-  as_fn_error $? "Could not find libm" "$LINENO" 5
-fi
-
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for MD5 in -lcrypto" >&5
 $as_echo_n "checking for MD5 in -lcrypto... " >&6; }
 if test "${ac_cv_lib_crypto_MD5+set}" = set; then :
diff -r 38dbecf592f7 -r be2ca8280da9 tools/configure.ac
--- a/tools/configure.ac        Wed Jul 25 17:39:22 2012 +0100
+++ b/tools/configure.ac        Wed Jul 25 17:39:23 2012 +0100
@@ -137,7 +137,6 @@ AC_CHECK_LIB([lzo2], [lzo1x_decompress],
 AC_SUBST(zlib)
 AC_CHECK_LIB([aio], [io_setup], [system_aio="y"], [system_aio="n"])
 AC_SUBST(system_aio)
-AC_CHECK_LIB([m], [isnan], [], [AC_MSG_ERROR([Could not find libm])])
 AC_CHECK_LIB([crypto], [MD5], [], [AC_MSG_ERROR([Could not find libcrypto])])
 AC_CHECK_LIB([ext2fs], [ext2fs_open2], [libext2fs="y"], [libext2fs="n"])
 AC_SUBST(libext2fs)
diff -r 38dbecf592f7 -r be2ca8280da9 tools/libxl/Makefile
--- a/tools/libxl/Makefile      Wed Jul 25 17:39:22 2012 +0100
+++ b/tools/libxl/Makefile      Wed Jul 25 17:39:23 2012 +0100
@@ -61,7 +61,7 @@ ifeq ($(BISON),)
                  scanners, please install it an rerun configure)
 endif
 
-LIBXL_LIBS += -lyajl -lm
+LIBXL_LIBS += -lyajl
 
 LIBXL_OBJS = flexarray.o libxl.o libxl_create.o libxl_dm.o libxl_pci.o \
                        libxl_dom.o libxl_exec.o libxl_xshelp.o libxl_device.o \

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