diff configure @ 557:aec36277d870

Linux build system updates following SV example

--- a/configure	Sun Feb 17 13:45:23 2019 +0000
+++ b/configure	Mon Feb 18 10:29:36 2019 +0000
@@ -624,7 +624,7 @@
 LIBOBJS
 QMAKE_CONFIG
 HAVES
-CXXFLAGS_MINIMAL
+CXXSTANDARD
 CUT
 SHA1SUM
 MAKEDEPEND
@@ -4411,7 +4411,6 @@
 
 SV_DEFINES_DEBUG="-DDEBUG -DBUILD_DEBUG -DWANT_TIMING"
 SV_DEFINES_RELEASE="-DNDEBUG -DBUILD_RELEASE -DNO_TIMING -DNO_HIT_COUNTS"
-SV_DEFINES_MINIMAL="$SV_DEFINES_RELEASE"
 
 # Now we have: USER_CXXFLAGS contains any flags the user set
 # explicitly; AUTOCONF_CXXFLAGS contains flags that Autoconf thought
@@ -4419,17 +4418,63 @@
 # allow ourselves to be overridden (later) by the former
 
 CXXFLAGS_DEBUG="$AUTOCONF_CXXFLAGS"
+OPTFLAGS_DEBUG="-O2"
+LDFLAGS_DEBUG=""
 CXXFLAGS_RELEASE="$AUTOCONF_CXXFLAGS"
-CXXFLAGS_MINIMAL="$AUTOCONF_CXXFLAGS"
+OPTFLAGS_RELEASE="-O2"
+LDFLAGS_RELEASE=""
+CXXSTANDARD=c++14
 
 if test "x$GCC" = "xyes"; then
-   	CXXFLAGS_ANY="-Wall -Wextra -Woverloaded-virtual -Wformat-nonliteral -Wformat-security -Winit-self -Wswitch-enum -Wconversion -pipe"
-        CXXFLAGS_DEBUG="$CXXFLAGS_ANY -Werror -g"
-   	CXXFLAGS_RELEASE="$CXXFLAGS_ANY -g0 -O3 -ffast-math"
-   	CXXFLAGS_MINIMAL="$CXXFLAGS_ANY -g0 -O0"
-fi
-
-CXXFLAGS_BUILD="$CXXFLAGS_RELEASE"
+   	CXXFLAGS_ANY="-fpic -Wall -Wextra -Woverloaded-virtual -Wformat-nonliteral -Wformat-security -Winit-self -Wswitch-enum -Wconversion -pipe"
+        CXXFLAGS_DEBUG="$CXXFLAGS_ANY -g -Werror"
+        OPTFLAGS_DEBUG="-O2"
+   	CXXFLAGS_RELEASE="$CXXFLAGS_ANY -g0"
+        OPTFLAGS_RELEASE="-O3 -ffast-math"
+        LIBS_DEBUG="$LIBS"
+        as_CACHEVAR=`$as_echo "ax_cv_check_cxxflags__--std=$CXXSTANDARD" | $as_tr_sh`
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C++ compiler accepts --std=$CXXSTANDARD" >&5
+$as_echo_n "checking whether C++ compiler accepts --std=$CXXSTANDARD... " >&6; }
+if eval \${$as_CACHEVAR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+  ax_check_save_flags=$CXXFLAGS
+  CXXFLAGS="$CXXFLAGS  --std=$CXXSTANDARD"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_cxx_try_compile "$LINENO"; then :
+  eval "$as_CACHEVAR=yes"
+else
+  eval "$as_CACHEVAR=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  CXXFLAGS=$ax_check_save_flags
+fi
+eval ac_res=\$$as_CACHEVAR
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+if eval test \"x\$"$as_CACHEVAR"\" = x"yes"; then :
+  :
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: Compiler does not appear to support $CXXSTANDARD, falling back to c++11" >&5
+$as_echo "$as_me: Compiler does not appear to support $CXXSTANDARD, falling back to c++11" >&6;}
+        CXXSTANDARD=c++11
+fi
+
+fi
+
+CXXFLAGS_BUILD="$CXXFLAGS_RELEASE $OPTFLAGS_RELEASE"
+LDFLAGS_BUILD="$LDFLAGS_RELEASE $OPTFLAGS_RELEASE"
 SV_DEFINES_BUILD="$SV_DEFINES_RELEASE"
 
 QMAKE_CONFIG="release"
@@ -4439,8 +4484,10 @@
   enableval=$enable_debug; { $as_echo "$as_me:${as_lineno-$LINENO}: enabling debug build" >&5
 $as_echo "$as_me: enabling debug build" >&6;}
 QMAKE_CONFIG="debug"
-CXXFLAGS_BUILD="$CXXFLAGS_DEBUG"
+CXXFLAGS_BUILD="$CXXFLAGS_DEBUG $OPTFLAGS_DEBUG"
+LDFLAGS_BUILD="$LDFLAGS_DEBUG"
 SV_DEFINES_BUILD="$SV_DEFINES_DEBUG"
+LIBS="$LIBS_DEBUG"
 fi
 
 
@@ -7407,6 +7454,8 @@
 
 
 
+
+
 ac_config_files="$ac_config_files config.pri"