https://sourceforge.net/p/yap/yap-6.3/ci/139f64a45900
https://sourceforge.net/p/yap/yap-6.3/ci/da61f1c31fed

--- configure.orig	2011-10-23 22:11:24 UTC
+++ configure
@@ -4397,13 +4397,9 @@ then
        C_PARSER_FLAGS="-O3 -Wall -Wstrict-prototypes -Wmissing-prototypes $CFLAGS"
        CFLAGS="-O3 -fomit-frame-pointer -Wall -Wstrict-prototypes -Wmissing-prototypes $CFLAGS"
        case "`$CC --version < /dev/null`" in
-	  *3.4*) CFLAGS="-fno-gcse -fno-crossjumping $CFLAGS" ;;
+	  gcc-3.4*) CFLAGS="-fno-gcse -fno-crossjumping $CFLAGS" ;;
        esac
        case "$target_cpu" in
-        i*86*)
-           CFLAGS="-DBP_FREE $CFLAGS"
-           CXXFLAGS="-DBP_FREE $CXXFLAGS"
-        ;;
         sparc*)
    case "$target_os" in
            *solaris2-9*)              CFLAGS="-mno-app-regs -DOPTIMISE_ALL_REGS_FOR_SPARC=1 $CFLAGS"
@@ -4433,10 +4429,6 @@ then
           i486*)
            CFLAGS="-march=i486 $CFLAGS"
            CXXFLAGS="-march=i486 $CXXFLAGS"
-          ;;
-          i386*)
-           CFLAGS="-march=i386 $CFLAGS"
-           CXXFLAGS="-march=i386 $CXXFLAGS"
           ;;
          esac
        fi