r1936 - packages/trunk/prboom/autotools

[Jon Dowland]

Author: jmtd-guest
Date: 2006-10-24 21:27:25 +0000 (Tue, 24 Oct 2006)
New Revision: 1936

Added:
   packages/trunk/prboom/autotools/ac_c_compile_flags.m4
   packages/trunk/prboom/autotools/ac_cpu_optimisations.m4
Log:
more missing files


Added: packages/trunk/prboom/autotools/ac_c_compile_flags.m4
===================================================================
--- packages/trunk/prboom/autotools/ac_c_compile_flags.m4	                        (rev 0)
+++ packages/trunk/prboom/autotools/ac_c_compile_flags.m4	2006-10-24 21:27:25 UTC (rev 1936)
@@ -0,0 +1,15 @@
+AC_DEFUN([AC_C_COMPILE_FLAGS],[
+NEW_CFLAGS="$CFLAGS"
+for ac_flag in $1
+do
+ AC_MSG_CHECKING(whether compiler supports $ac_flag)
+ CFLAGS="$NEW_CFLAGS $ac_flag"
+ AC_TRY_COMPILE(,[
+  void f() {};
+ ],[
+  NEW_CFLAGS="$CFLAGS"
+  AC_MSG_RESULT(yes)
+ ],AC_MSG_RESULT(no))
+done
+CFLAGS="$NEW_CFLAGS"
+])

Added: packages/trunk/prboom/autotools/ac_cpu_optimisations.m4
===================================================================
--- packages/trunk/prboom/autotools/ac_cpu_optimisations.m4	                        (rev 0)
+++ packages/trunk/prboom/autotools/ac_cpu_optimisations.m4	2006-10-24 21:27:25 UTC (rev 1936)
@@ -0,0 +1,29 @@
+dnl AC_CPU_OPTIMISATIONS
+dnl Tries to find compiler optimisation flags for the target system
+AC_DEFUN([AC_CPU_OPTIMISATIONS],[
+AC_REQUIRE([AC_CANONICAL_TARGET])
+AC_ARG_ENABLE(cpu-opt,AC_HELP_STRING([--disable-cpu-opt],[turns off cpu specific optimisations]),[
+],[
+AC_MSG_CHECKING(whether compiler supports -march=native)
+OLD_CFLAGS="$CFLAGS"
+CFLAGS="$OLD_CFLAGS -march=native"
+AC_TRY_COMPILE(,[
+  void f() {};
+],[
+  AC_MSG_RESULT(yes)
+],[
+  AC_MSG_RESULT(no)
+  CFLAGS="$OLD_CFLAGS"
+
+  case "$target" in
+        # marginal gains from aligning code
+  i386-*) ;;
+  i486-*) CPU_CFLAGS="-mtune=i486" ;;
+        # nothing special for pentium  
+        # CMOV op on ppro/II/686 can help us
+  i686-*) CPU_CFLAGS="-march=i686" ;;
+  esac
+  AC_C_COMPILE_FLAGS($CPU_CFLAGS) 
+])
+])
+])