Changes with nginx 1.3.4 31 Jul 2012v1.3.4

*) Change: the "ipv6only" parameter is now turned on by default for
listening IPv6 sockets.

*) Feature: the Clang compiler support.

*) Bugfix: extra listening sockets might be created.
Thanks to Roman Odaisky.

*) Bugfix: nginx/Windows might hog CPU if a worker process failed to
start.
Thanks to Ricardo Villalobos Guevara.

*) Bugfix: the "proxy_pass_header", "fastcgi_pass_header",
"scgi_pass_header", "uwsgi_pass_header", "proxy_hide_header",
"fastcgi_hide_header", "scgi_hide_header", and "uwsgi_hide_header"
directives might be inherited incorrectly.

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4 files changed, 119 insertions, 29 deletions

diff --git a/auto/cc/clang b/auto/cc/clang
new file mode 100644
index 000000000..9f60d7b3a
--- /dev/null
+++ b/auto/cc/clang
@@ -0,0 +1,98 @@
+
+# Copyright (C) Nginx, Inc.
+
+
+# clang
+
+
+NGX_CLANG_VER=`$CC -v 2>&1 | grep 'clang version' 2>&1 \
+                           | sed -e 's/^.*clang version \(.*\)/\1/'`
+
+echo " + clang version: $NGX_CLANG_VER"
+
+have=NGX_COMPILER value="\"clang $NGX_CLANG_VER\"" . auto/define
+
+
+CC_TEST_FLAGS="-pipe"
+
+
+# optimizations
+
+#NGX_CLANG_OPT="-O2"
+#NGX_CLANG_OPT="-Oz"
+NGX_CLANG_OPT="-O"
+
+case $CPU in
+    pentium)
+        # optimize for Pentium
+        CPU_OPT="-march=pentium"
+        NGX_CPU_CACHE_LINE=32
+    ;;
+
+    pentiumpro | pentium3)
+        # optimize for Pentium Pro, Pentium II and Pentium III
+        CPU_OPT="-march=pentiumpro"
+        NGX_CPU_CACHE_LINE=32
+    ;;
+
+    pentium4)
+        # optimize for Pentium 4
+        CPU_OPT="-march=pentium4"
+        NGX_CPU_CACHE_LINE=128
+    ;;
+
+    athlon)
+        # optimize for Athlon
+        CPU_OPT="-march=athlon"
+        NGX_CPU_CACHE_LINE=64
+    ;;
+
+    opteron)
+        # optimize for Opteron
+        CPU_OPT="-march=opteron"
+        NGX_CPU_CACHE_LINE=64
+    ;;
+
+esac
+
+CC_AUX_FLAGS="$CC_AUX_FLAGS $CPU_OPT"
+
+
+CFLAGS="$CFLAGS -pipe $CPU_OPT"
+
+if [ ".$PCRE_OPT" = "." ]; then
+    PCRE_OPT="-O2 -pipe $CPU_OPT"
+else
+    PCRE_OPT="$PCRE_OPT -pipe"
+fi
+
+if [ ".$MD5_OPT" = "." ]; then
+    MD5_OPT="-O2 -pipe $CPU_OPT"
+else
+    MD5_OPT="$MD5_OPT -pipe"
+fi
+
+if [ ".$ZLIB_OPT" = "." ]; then
+    ZLIB_OPT="-O2 -pipe $CPU_OPT"
+else
+    ZLIB_OPT="$ZLIB_OPT -pipe"
+fi
+
+
+# warnings
+
+CFLAGS="$CFLAGS $NGX_CLANG_OPT -Wall -Wextra -Wpointer-arith"
+#CFLAGS="$CFLAGS -Wmissing-prototypes"
+
+# we have a lot of unused function arguments
+CFLAGS="$CFLAGS -Wno-unused-parameter"
+
+# stop on warning
+#CFLAGS="$CFLAGS -Werror"
+
+# debug
+CFLAGS="$CFLAGS -g"
+
+if [ ".$CPP" = "." ]; then
+    CPP="$CC -E"
+fi
diff --git a/auto/cc/conf b/auto/cc/conf
index c9118f2fd..8027b9805 100644
--- a/auto/cc/conf
+++ b/auto/cc/conf
@@ -56,6 +56,12 @@ else
             . auto/cc/gcc
         ;;
 
+        clang)
+            # Clang C compiler
+
+            . auto/cc/clang
+        ;;
+
         icc)
             # Intel C++ compiler 7.1, 8.0, 8.1
 
diff --git a/auto/cc/gcc b/auto/cc/gcc
index de666a34c..c27d857e3 100644
--- a/auto/cc/gcc
+++ b/auto/cc/gcc
@@ -149,15 +149,13 @@ CFLAGS="$CFLAGS ${NGX_GCC_OPT:--O} -W"
 CFLAGS="$CFLAGS -Wall -Wpointer-arith"
 #CFLAGS="$CFLAGS -Wconversion"
 #CFLAGS="$CFLAGS -Winline"
+#CFLAGS="$CFLAGS -Wmissing-prototypes"
 
 
 case "$NGX_GCC_VER" in
     3.* | 4.* )
         # we have a lot of the unused function arguments
         CFLAGS="$CFLAGS -Wno-unused-parameter"
-        CFLAGS="$CFLAGS -Wunused-function"
-        CFLAGS="$CFLAGS -Wunused-variable"
-        CFLAGS="$CFLAGS -Wunused-value"
         # 4.2.1 shows the warning in wrong places
         #CFLAGS="$CFLAGS -Wunreachable-code"
     ;;
diff --git a/auto/cc/name b/auto/cc/name
index 7860c69e2..7a5656c64 100644
--- a/auto/cc/name
+++ b/auto/cc/name
@@ -32,14 +32,14 @@ if [ "$CC" = cl ]; then
         NGX_CC_NAME=msvc10
         echo " + using Microsoft Visual C++ 10 compiler"
 
-    else if `$NGX_WINE $CC -v 2>&1 \
+    elif `$NGX_WINE $CC -v 2>&1 \
         | grep '^Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 14' \
         >/dev/null 2>&1`; then
 
         NGX_CC_NAME=msvc8
         echo " + using Microsoft Visual C++ 8 compiler"
 
-    else if `$NGX_WINE $CC -v 2>&1 \
+    elif `$NGX_WINE $CC -v 2>&1 \
         | grep '^Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 13' \
         >/dev/null 2>&1`; then
 
@@ -50,52 +50,40 @@ if [ "$CC" = cl ]; then
         NGX_CC_NAME=msvc
         echo " + using Microsoft Visual C++ compiler"
     fi
-    fi
-    fi
 
-else
-if [ "$CC" = wcl386 ]; then
+elif [ "$CC" = wcl386 ]; then
     NGX_CC_NAME=owc
     echo " + using Open Watcom C compiler"
 
-else
-if [ "$CC" = bcc32 ]; then
+elif [ "$CC" = bcc32 ]; then
     NGX_CC_NAME=bcc
     echo " + using Borland C++ compiler"
 
-else
-if `$CC -V 2>&1 | grep '^Intel(R) C' >/dev/null 2>&1`; then
+elif `$CC -V 2>&1 | grep '^Intel(R) C' >/dev/null 2>&1`; then
     NGX_CC_NAME=icc
     echo " + using Intel C++ compiler"
 
-else
-if `$CC -v 2>&1 | grep 'gcc version' >/dev/null 2>&1`; then
+elif `$CC -v 2>&1 | grep 'gcc version' >/dev/null 2>&1`; then
     NGX_CC_NAME=gcc
     echo " + using GNU C compiler"
 
-else
-if `$CC -V 2>&1 | grep 'Sun C' >/dev/null 2>&1`; then
+elif `$CC -v 2>&1 | grep 'clang version' >/dev/null 2>&1`; then
+    NGX_CC_NAME=clang
+    echo " + using Clang C compiler"
+
+elif `$CC -V 2>&1 | grep 'Sun C' >/dev/null 2>&1`; then
     NGX_CC_NAME=sunc
     echo " + using Sun C compiler"
 
-else
-if `$CC -V 2>&1 | grep '^Compaq C' >/dev/null 2>&1`; then
+elif `$CC -V 2>&1 | grep '^Compaq C' >/dev/null 2>&1`; then
     NGX_CC_NAME=ccc
     echo " + using Compaq C compiler"
 
-else
-if `$CC -V 2>&1 | grep '^aCC: ' >/dev/null 2>&1`; then
+elif `$CC -V 2>&1 | grep '^aCC: ' >/dev/null 2>&1`; then
     NGX_CC_NAME=acc
     echo " + using HP aC++ compiler"
 
 else
     NGX_CC_NAME=unknown
 
-fi # acc
-fi # ccc
-fi # sunc
-fi # icc
-fi # gcc
-fi # bcc
-fi # owc
-fi # msvc
+fi