X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=configure;h=d34c000656bf7f6970d6a2eb917b8715761bbc69;hp=cefd61032284ddc36013a7d7ab1d8aaa9bc71b71;hb=3a03f0cf8005221d90045bed762e7d5e38f944fb;hpb=d30455b5f301b9c8017a0c7439573835d7e177de

diff --git a/configure b/configure
index cefd6103..d34c0006 100755
--- a/configure
+++ b/configure
@@ -225,7 +225,20 @@ if test "$show_help" = "yes" ; then
 fi
 
 cross_prefix=${cross_prefix-${CROSS_COMPILE}}
-cc="${CC-${cross_prefix}gcc}"
+# Preferred compiler (can be overriden later after we know the platform):
+#  ${CC} (if set)
+#  ${cross_prefix}gcc (if cross-prefix specified)
+#  gcc if available
+#  clang if available
+if test -z "${CC}${cross_prefix}"; then
+  if has gcc; then
+    cc=gcc
+  elif has clang; then
+    cc=clang
+  fi
+else
+  cc="${CC-${cross_prefix}gcc}"
+fi
 
 if check_define __ANDROID__ ; then
   targetos="Android"
@@ -301,16 +314,16 @@ SunOS)
 CYGWIN*)
   # We still force some options, so keep this message here.
   echo "Forcing some known good options on Windows"
-  if test -z "$CC" ; then
+  if test -z "${CC}${cross_prefix}"; then
     if test ! -z "$build_32bit_win" && test "$build_32bit_win" = "yes"; then
-      CC="i686-w64-mingw32-gcc"
+      cc="i686-w64-mingw32-gcc"
       if test -e "../zlib/contrib/vstudio/vc14/x86/ZlibStatReleaseWithoutAsm/zlibstat.lib"; then
         echo "Building with zlib support"
         output_sym "CONFIG_ZLIB"
         echo "LIBS=../zlib/contrib/vstudio/vc14/x86/ZlibStatReleaseWithoutAsm/zlibstat.lib" >> $config_host_mak
       fi
     else
-      CC="x86_64-w64-mingw32-gcc"
+      cc="x86_64-w64-mingw32-gcc"
       if test -e "../zlib/contrib/vstudio/vc14/x64/ZlibStatReleaseWithoutAsm/zlibstat.lib"; then
         echo "Building with zlib support"
         output_sym "CONFIG_ZLIB"
@@ -330,6 +343,8 @@ CYGWIN*)
   # Flags below are still necessary mostly for MinGW.
   socklen_t="yes"
   sfaa="yes"
+  sync_sync="yes"
+  cmp_swap="yes"
   rusage_thread="yes"
   fdatasync="yes"
   clock_gettime="yes" # clock_monotonic probe has dependency on this
@@ -340,11 +355,25 @@ CYGWIN*)
   tls_thread="yes"
   static_assert="yes"
   ipv6="yes"
-  echo "CC=$CC" >> $config_host_mak
+  mkdir_two="no"
   echo "BUILD_CFLAGS=$CFLAGS -I../zlib -include config-host.h -D_GNU_SOURCE" >> $config_host_mak
   ;;
 esac
 
+# Now we know the target platform we can have another guess at the preferred
+# compiler when it wasn't explictly set
+if test -z "${CC}${cross_prefix}"; then
+  if test "$targetos" = "FreeBSD" || test "$targetos" = "Darwin"; then
+    if has clang; then
+      cc=clang
+    fi
+  fi
+fi
+if test -z "$cc"; then
+    echo "configure: failed to find compiler"
+    exit 1
+fi
+
 if test ! -z "$cpu" ; then
   # command line argument
   :
@@ -415,18 +444,6 @@ case "$cpu" in
   ;;
 esac
 
-if test -z "$CC" ; then
-  if test "$targetos" = "FreeBSD"; then
-    if has clang; then
-      CC=clang
-    else
-      CC=gcc
-    fi
-  fi
-fi
-
-cc="${CC-${cross_prefix}gcc}"
-
 ##########################################
 # check cross compile
 
@@ -691,6 +708,44 @@ if compile_prog "" "" "__sync_fetch_and_add()" ; then
 fi
 print_config "__sync_fetch_and_add" "$sfaa"
 
+##########################################
+# __sync_synchronize() test
+if test "$sync_sync" != "yes" ; then
+  sync_sync="no"
+fi
+cat > $TMPC << EOF
+#include <inttypes.h>
+
+int main(int argc, char **argv)
+{
+  __sync_synchronize();
+  return 0;
+}
+EOF
+if compile_prog "" "" "__sync_synchronize()" ; then
+    sync_sync="yes"
+fi
+print_config "__sync_synchronize" "$sync_sync"
+
+##########################################
+# __sync_val_compare_and_swap() test
+if test "$cmp_swap" != "yes" ; then
+  cmp_swap="no"
+fi
+cat > $TMPC << EOF
+#include <inttypes.h>
+
+int main(int argc, char **argv)
+{
+  int x = 0;
+  return __sync_val_compare_and_swap(&x, 1, 2);
+}
+EOF
+if compile_prog "" "" "__sync_val_compare_and_swap()" ; then
+    cmp_swap="yes"
+fi
+print_config "__sync_val_compare_and_swap" "$cmp_swap"
+
 ##########################################
 # libverbs probe
 if test "$libverbs" != "yes" ; then
@@ -2033,6 +2088,22 @@ if test "$enable_cuda" = "yes" && compile_prog "" "-lcuda" "cuda"; then
 fi
 print_config "cuda" "$cuda"
 
+##########################################
+# mkdir() probe. mingw apparently has a one-argument mkdir :/
+mkdir_two="no"
+cat > $TMPC << EOF
+#include <sys/stat.h>
+#include <sys/types.h>
+int main(int argc, char **argv)
+{
+  return mkdir("/tmp/bla", 0600);
+}
+EOF
+if compile_prog "" "" "mkdir(a, b)"; then
+  mkdir_two="yes"
+fi
+print_config "mkdir(a, b)" "$mkdir_two"
+
 #############################################################################
 
 if test "$wordsize" = "64" ; then
@@ -2077,6 +2148,12 @@ fi
 if test "$sfaa" = "yes" ; then
   output_sym "CONFIG_SFAA"
 fi
+if test "$sync_sync" = "yes" ; then
+  output_sym "CONFIG_SYNC_SYNC"
+fi
+if test "$cmp_swap" = "yes" ; then
+  output_sym "CONFIG_CMP_SWAP"
+fi
 if test "$libverbs" = "yes" -a "$rdmacm" = "yes" ; then
   output_sym "CONFIG_RDMA"
 fi
@@ -2261,6 +2338,9 @@ fi
 if test "$cuda" = "yes" ; then
   output_sym "CONFIG_CUDA"
 fi
+if test "$mkdir_two" = "yes" ; then
+  output_sym "CONFIG_HAVE_MKDIR_TWO"
+fi
 
 echo "LIBS+=$LIBS" >> $config_host_mak
 echo "GFIO_LIBS+=$GFIO_LIBS" >> $config_host_mak