Check for cc masquerading as gcc or clang in configure.

[zlib.git] / configure

diff --git a/configure b/configure
index c4fee2e2e0aa625cb5e2cdc2e2382e6f212bef5d..52ff4a04ea899896c5ae2b69db737cc30d3a2606 100755 (executable)
--- a/configure
+++ b/configure
@@ -87,6 +87,7 @@ build64=0
 gcc=0
 warn=0
 debug=0
+sanitize=0
 old_cc="$CC"
 old_cflags="$CFLAGS"
 OBJC='$(OBJZ) $(OBJG)'
@@ -137,6 +138,7 @@ case "$1" in
     -c* | --const) zconst=1; shift ;;
     -w* | --warn) warn=1; shift ;;
     -d* | --debug) debug=1; shift ;;
+    --sanitize) sanitize=1; shift ;;
     *)
       echo "unknown option: $1" | tee -a configure.log
       echo "$0 --help for help" | tee -a configure.log
@@ -165,8 +167,14 @@ extern int getchar();
 int hello() {return getchar();}
 EOF
 
-test -z "$CC" && echo Checking for ${CROSS_PREFIX}gcc... | tee -a configure.log
-cc=${CC-${CROSS_PREFIX}gcc}
+if test -z "$CC"; then
+  echo Checking for ${CROSS_PREFIX}gcc... | tee -a configure.log
+  if ${CROSS_PREFIX}gcc -v >/dev/null 2>&1; then
+    cc=${CROSS_PREFIX}gcc
+  else
+    cc=${CROSS_PREFIX}cc
+  fi
+fi
 cflags=${CFLAGS-"-O3"}
 # to force the asm version use: CFLAGS="-O3 -DASMV" ./configure
 case "$cc" in
@@ -175,6 +183,7 @@ case "$cc" in
 esac
 case `$cc -v 2>&1` in
   *gcc*) gcc=1 ;;
+  *clang*) gcc=1 ;;
 esac
 
 show $cc -c $test.c
@@ -198,6 +207,9 @@ if test "$gcc" -eq 1 && ($cc -c $test.c) >> configure.log 2>&1; then
       CFLAGS="${CFLAGS} -Wall -Wextra -pedantic"
     fi
   fi
+  if test $sanitize -eq 1; then
+    CFLAGS="${CFLAGS} -fsanitize=address"
+  fi
   if test $debug -eq 1; then
     CFLAGS="${CFLAGS} -DZLIB_DEBUG"
     SFLAGS="${SFLAGS} -DZLIB_DEBUG"
@@ -366,8 +378,11 @@ else
   try()
   {
     show $*
-    ( $* ) >> configure.log 2>&1
+    got=`( $* ) 2>&1`
     ret=$?
+    if test "$got" != ""; then
+      printf "%s\n" "$got" >> configure.log
+    fi
     if test $ret -ne 0; then
       echo "(exit code "$ret")" >> configure.log
     fi
@@ -380,8 +395,11 @@ tryboth()
   show $*
   got=`( $* ) 2>&1`
   ret=$?
-  printf %s "$got" >> configure.log
+  if test "$got" != ""; then
+    printf "%s\n" "$got" >> configure.log
+  fi
   if test $ret -ne 0; then
+    echo "(exit code "$ret")" >> configure.log
     return $ret
   fi
   test "$got" = ""
@@ -456,32 +474,11 @@ size_t dummy = 0;
 EOF
 if try $CC -c $CFLAGS $test.c; then
   echo "Checking for size_t... Yes." | tee -a configure.log
-  need_sizet=0
 else
   echo "Checking for size_t... No." | tee -a configure.log
-  need_sizet=1
-fi
-
-echo >> configure.log
-
-# check for ssize_t
-cat > $test.c <<EOF
-#include <sys/types.h>
-ssize_t dummy = 0;
-EOF
-if try $CC -c $CFLAGS $test.c; then
-  echo "Checking for ssize_t... Yes." | tee -a configure.log
-  need_ssizet=0
-else
-  echo "Checking for ssize_t... No." | tee -a configure.log
-  need_ssizet=1
-fi
-
-echo >> configure.log
-
-# find the size_t integer type, if needed
-if test $need_sizet -eq 1 -o $need_ssizet -eq 1; then
-  cat > $test.c <<EOF
+  # find a size_t integer type
+  # check for long long
+  cat > $test.c << EOF
 long long dummy = 0;
 EOF
   if try $CC -c $CFLAGS $test.c; then
@@ -509,22 +506,13 @@ EOF
   if try $CC $CFLAGS -o $test $test.c; then
     sizet=`./$test`
     echo "Checking for a pointer-size integer type..." $sizet"." | tee -a configure.log
+    CFLAGS="${CFLAGS} -DNO_SIZE_T=${sizet}"
+    SFLAGS="${SFLAGS} -DNO_SIZE_T=${sizet}"
   else
-    echo "Failed to find a pointer-size integer type." | tee -a configure.log
-    leave 1
+    echo "Checking for a pointer-size integer type... not found." | tee -a configure.log
   fi
 fi
 
-if test $need_sizet -eq 1; then
-  CFLAGS="${CFLAGS} -DNO_SIZE_T=${sizet}"
-  SFLAGS="${SFLAGS} -DNO_SIZE_T=${sizet}"
-fi
-
-if test $need_ssizet -eq 1; then
-  CFLAGS="${CFLAGS} -DNO_SSIZE_T=${sizet}"
-  SFLAGS="${SFLAGS} -DNO_SSIZE_T=${sizet}"
-fi
-
 echo >> configure.log
 
 # check for large file support, and if none, check for fseeko()
@@ -868,7 +856,6 @@ echo SHAREDLIBV = $SHAREDLIBV >> configure.log
 echo STATICLIB = $STATICLIB >> configure.log
 echo TEST = $TEST >> configure.log
 echo VER = $VER >> configure.log
-echo Z_U4 = $Z_U4 >> configure.log
 echo SRCDIR = $SRCDIR >> configure.log
 echo exec_prefix = $exec_prefix >> configure.log
 echo includedir = $includedir >> configure.log