math: optimize lrint on 32bit targets

[musl] / configure

diff --git a/configure b/configure
index 6310e0b..8680128 100755 (executable)
--- a/configure
+++ b/configure
@@ -172,6 +172,8 @@ case "$arg" in
 --host=*|--target=*) target=${arg#*=} ;;
 --build=*) build=${arg#*=} ;;
 -* ) echo "$0: unknown option $arg" ;;
+AR=*) AR=${arg#*=} ;;
+RANLIB=*) RANLIB=${arg#*=} ;;
 CC=*) CC=${arg#*=} ;;
 CFLAGS=*) CFLAGS=${arg#*=} ;;
 CPPFLAGS=*) CPPFLAGS=${arg#*=} ;;
@@ -322,6 +324,7 @@ microblaze*) ARCH=microblaze ;;
 or1k*) ARCH=or1k ;;
 powerpc64*|ppc64*) ARCH=powerpc64 ;;
 powerpc*|ppc*) ARCH=powerpc ;;
+riscv64*) ARCH=riscv64 ;;
 sh[1-9bel-]*|sh|superh*) ARCH=sh ;;
 s390x*) ARCH=s390x ;;
 unknown) fail "$0: unable to detect target arch; try $0 --target=..." ;;
@@ -573,6 +576,20 @@ printf "using compiler runtime libraries: %s\n" "$LIBCC"
 SUBARCH=
 t="$CFLAGS_C99FSE $CPPFLAGS $CFLAGS"
 
+if test "$ARCH" = "i386" ; then
+printf "checking whether compiler can use ebx in PIC asm constraints... "
+cat > "$tmpc" <<EOF
+int foo(int x) { __asm__ ( "" : "+b"(x) ); return x; }
+EOF
+if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS -fPIC \
+  -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
+printf "yes\n"
+else
+printf "no\n"
+CFLAGS_AUTO="$CFLAGS_AUTO -DBROKEN_EBX_ASM"
+fi
+fi
+
 if test "$ARCH" = "x86_64" ; then
 trycppif __ILP32__ "$t" && ARCH=x32
 fi
@@ -640,6 +657,11 @@ trycppif __LITTLE_ENDIAN__ "$t" && SUBARCH=${SUBARCH}le
 trycppif _SOFT_FLOAT "$t" && fail "$0: error: soft-float not supported on powerpc64"
 fi
 
+if test "$ARCH" = "riscv64" ; then
+trycppif __riscv_float_abi_soft "$t" && SUBARCH=${SUBARCH}-sf
+trycppif __riscv_float_abi_single "$t" && SUBARCH=${SUBARCH}-sp
+fi
+
 if test "$ARCH" = "sh" ; then
 tryflag CFLAGS_AUTO -Wa,--isa=any
 trycppif __BIG_ENDIAN__ "$t" && SUBARCH=${SUBARCH}eb
@@ -714,6 +736,8 @@ cat << EOF
 # This version of config.mak was generated by:
 # $cmdline
 # Any changes made here will be lost if configure is re-run
+AR = ${AR:-\$(CROSS_COMPILE)ar}
+RANLIB = ${RANLIB:-\$(CROSS_COMPILE)ranlib}
 ARCH = $ARCH
 SUBARCH = $SUBARCH
 ASMSUBARCH = $ASMSUBARCH