enable link-time-optimizations by default

diff --git a/configure.ac b/configure.ac
index 81af5a0a1edd66930480a371c6a1dca0a590729a..47f8153a43c76d9e30e779ade4ab3c909ac9bbd4 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -101,6 +101,12 @@ AC_ARG_ENABLE(
     ,
     [enable_x86_sse="yes"]
 )
+AC_ARG_ENABLE(
+    [lto],
+    [AS_HELP_STRING([--disable-lto], [Link Time Optimizations @<:@default enabled@:>@])],
+    ,
+    [enable_lto="detect"]
+)
 
 
 # -----------------------------------------------------------------------------
@@ -145,6 +151,7 @@ AC_CHECK_HEADERS_ONCE([sys/prctl.h])
 # -----------------------------------------------------------------------------
 # operating system detection
 
+AC_MSG_CHECKING([operating system])
 case "$host_os" in
 freebsd*)
     build_target=freebsd
@@ -161,6 +168,7 @@ esac
 AM_CONDITIONAL([FREEBSD], [test "${build_target}" = "freebsd"])
 AM_CONDITIONAL([MACOS], [test "${build_target}" = "macos"])
 AM_CONDITIONAL([LINUX], [test "${build_target}" = "linux"])
+AC_MSG_RESULT([${build_target}])
 
 
 # -----------------------------------------------------------------------------
@@ -173,8 +181,23 @@ AS_CASE([$host_cpu],
 AC_SUBST([SSE_CANDIDATE])
 if test "${SSE_CANDIDATE}" = "yes" -a "${enable_x86_sse}" = "yes"; then
     opt="-msse2 -mfpmath=sse"
-    AX_CHECK_COMPILE_FLAG($opt, [CFLAGS="$CFLAGS $opt"], [])
+    AX_CHECK_COMPILE_FLAG(${opt}, [CFLAGS="${CFLAGS} ${opt}"], [])
+fi
+
+if test "${enable_lto}" != "no"; then
+    opt="-flto"
+    AX_CHECK_COMPILE_FLAG(${opt}, [have_lto=yes], [have_lto=no])
+fi
+test "${enable_lto}" = "yes" -a "${have_lto}" != "yes" && \
+    AC_MSG_ERROR([LTO is required but is not available.])
+AC_MSG_CHECKING([if LTO should be enabled])
+if test "${enable_lto}" != "no" -a "${have_lto}" = "yes"; then
+    enable_lto="yes"
+    CFLAGS="${CFLAGS} -flto"
+else
+    enable_lto="no"
 fi
+AC_MSG_RESULT([${enable_lto}])
 
 if test "${GCC}" = "yes"; then
     AC_DEFINE_UNQUOTED([likely(x)], [__builtin_expect(!!(x), 1)], [gcc branch optimization])

diff --git a/netdata-installer.sh b/netdata-installer.sh
index ee2aded15f327ee36f0d1de1da5867f9d31f2927..c49ef32ceb2d14dbc2f4b486351e4db00b7c871c 100755 (executable)
--- a/netdata-installer.sh
+++ b/netdata-installer.sh
@@ -104,6 +104,12 @@ Valid <installer options> are:
         Enable/disable the FreeIPMI plugin.
         Default: enable it when libipmimonitoring is available.
 
+   --enable-lto
+   --disable-lto
+
+        Enable/disable Link-Time-Optimization
+        Default: enabled
+
    --zlib-is-really-here
    --libs-are-really-here
 
@@ -199,6 +205,14 @@ do
         then
         NETDATA_CONFIGURE_OPTIONS="${NETDATA_CONFIGURE_OPTIONS} --disable-plugin-freeipmi"
         shift 1
+    elif [ "$1" = "--enable-lto" ]
+        then
+        NETDATA_CONFIGURE_OPTIONS="${NETDATA_CONFIGURE_OPTIONS} --enable-lto"
+        shift 1
+    elif [ "$1" = "--disable-lto" ]
+        then
+        NETDATA_CONFIGURE_OPTIONS="${NETDATA_CONFIGURE_OPTIONS} --disable-lto"
+        shift 1
     elif [ "$1" = "--help" -o "$1" = "-h" ]
         then
         usage

diff --git a/src/clocks.c b/src/clocks.c
index 4a2c37f2923648f80a24953280f35af4bded9ddd..879ebf911790e1efd892558efab5c0351509b693 100644 (file)
--- a/src/clocks.c
+++ b/src/clocks.c
@@ -27,8 +27,13 @@ static inline usec_t now_usec(clockid_t clk_id) {
 
 static inline int now_timeval(clockid_t clk_id, struct timeval *tv) {
     struct timespec ts;
-    if(unlikely(clock_gettime(clk_id, &ts) == -1))
+
+    if(unlikely(clock_gettime(clk_id, &ts) == -1)) {
+        tv->tv_sec = 0;
+        tv->tv_usec = 0;
         return -1;
+    }
+
     tv->tv_sec = ts.tv_sec;
     tv->tv_usec = (suseconds_t)((ts.tv_nsec % NSEC_PER_SEC) / NSEC_PER_USEC);
     return 0;