Don't blindly assume -lm presence. Add a check for the host and remove the -lm

on Haiku so building should work natively.


git-svn-id: file:///srv/svn/repos/haiku/buildtools/trunk@29071 a95241bf-73f2-0310-859d-f6bbb57e9c96

gcc/gcc/Makefile.in

@@ -3265,7 +3265,7 @@ genprogmd = attr attrtab automata codes conditions config constants emit \
 $(genprogmd:%=build/gen%$(build_exeext)): $(BUILD_RTL) $(BUILD_ERRORS)
 
 # These programs need libs over and above what they get from the above list.
-build/genautomata$(build_exeext) : BUILD_LIBS += -lm
+build/genautomata$(build_exeext) : BUILD_LIBS += @math_library@
 
 # These programs are not linked with the MD reader.
 build/gengenrtl$(build_exeext) : $(BUILD_ERRORS)

gcc/gcc/configure

@@ -9064,6 +9064,15 @@ esac
 # --------
 
 
+# Configure -lm usage for host tools that need it
+math_library="-lm"
+case $host in
+  *-*-haiku*)
+    # no separate math library needed
+    math_library=
+    ;;
+esac
+
 # These libraries may be used by collect2.
 # We may need a special search path to get them linked.
 echo "$as_me:$LINENO: checking for collect2 libraries" >&5
@@ -24035,6 +24044,7 @@ s,@LIBOBJS@,$LIBOBJS,;t t
 s,@LTLIBOBJS@,$LTLIBOBJS,;t t
 /@language_hooks@/r $language_hooks
 s,@language_hooks@,,;t t
+s,@math_library@,$math_library,;t t
 CEOF
 
 _ACEOF