# 
# add_file "m4/prog_cxx_warnings.m4"
# 
# patch "Makefile.am"
#  from [48577e71107e5e2bef13349eaef8bd22778ec676]
#    to [5f90663376031daaec9ea531de77309097820a25]
# 
# patch "configure.ac"
#  from [3c5b1e038f4c1436c9d021905bb86fbc48772349]
#    to [4cd637ba337c35746c0e0ff4716cf00d5e669dbd]
# 
# patch "m4/prog_cxx_warnings.m4"
#  from []
#    to [139fc00ee4d586ee79176dab19b0fc9e1338b83f]
# 
========================================================================
--- Makefile.am	48577e71107e5e2bef13349eaef8bd22778ec676
+++ Makefile.am	5f90663376031daaec9ea531de77309097820a25
@@ -416,7 +416,7 @@
 CLEANFILES = $(BUILT_SOURCES_CLEAN) $(EPS_FIGURES)
 
 txt2c: txt2c.cc Makefile
-	$(CXX) -o $@ $<
+	$(CXX) $(CXXFLAGS) -o $@ $<
 	chmod 0755 address@hidden(EXEEXT)
 
 apidocs:
========================================================================
--- configure.ac	3c5b1e038f4c1436c9d021905bb86fbc48772349
+++ configure.ac	4cd637ba337c35746c0e0ff4716cf00d5e669dbd
@@ -27,6 +27,8 @@
 AC_PROG_RANLIB
 AC_LANG(C++)
 
+AC_PROG_CXX_WARNINGS
+
 AC_CXX_GNUCXX_HASHMAP
 AC_CXX_STLPORT_HASHMAP
 
========================================================================
--- m4/prog_cxx_warnings.m4	
+++ m4/prog_cxx_warnings.m4	139fc00ee4d586ee79176dab19b0fc9e1338b83f
@@ -0,0 +1,148 @@
+dnl @synopsis AC_PROG_CXX_WARNINGS([ANSI])
+dnl
+dnl Enables a reasonable set of warnings for the C compiler.
+dnl Optionally, if the first argument is nonempty, turns on flags which
+dnl enforce and/or enable proper ANSI C if such are known with the
+dnl compiler used.
+dnl
+dnl Currently this macro knows about GCC, Solaris C compiler, Digital
+dnl Unix C compiler, C for AIX Compiler, HP-UX C compiler, IRIX C
+dnl compiler, NEC SX-5 (Super-UX 10) C compiler, and Cray J90 (Unicos
+dnl 10.0.0.8) C compiler.
+dnl
+dnl for C++, some of them might not work, esp. because I didn't adapt
+dnl the strings to compare compiler type. known to work are:
+dnl GCC, Sun Studio
+dnl
+dnl based on VL_PROG_CC_WARNINGS by Ville Laurikari <address@hidden>
+dnl
+dnl WORK IN PROGRESS: please don't release separately yet.
+dnl                   patches welcome!
+dnl
+dnl @category Cxx
+dnl @author Patrick Mauritz <address@hidden>
+dnl @version 2005-08-15
+dnl @license AllPermissive
+
+AC_DEFUN([AC_PROG_CXX_WARNINGS], [
+  ansi=$1
+  if test -z "$ansi"; then
+    msg="for C++ compiler warning flags"
+  else
+    msg="for C++ compiler warning and ANSI conformance flags"
+  fi
+  AC_CACHE_CHECK($msg, ac_cv_prog_cxx_warnings, [
+    if test -n "$CXX"; then
+      cat > conftest.c <<EOF
+int main(int argc, char **argv) { return 0; }
+EOF
+
+      dnl GCC
+      if test "$GXX" = "yes"; then
+        if test -z "$ansi"; then
+          ac_cv_prog_cxx_warnings="-Wall"
+        else
+          ac_cv_prog_cxx_warnings="-Wall -ansi -pedantic"
+        fi
+
+      dnl Most compilers print some kind of a version string with some command
+      dnl line options (often "-V").  The version string should be checked
+      dnl before doing a test compilation run with compiler-specific flags.
+      dnl This is because some compilers (like the Cray compiler) only
+      dnl produce a warning message for unknown flags instead of returning
+      dnl an error, resulting in a false positive.  Also, compilers may do
+      dnl erratic things when invoked with flags meant for a different
+      dnl compiler.
+
+      dnl Solaris C compiler (WorkShop)
+      elif $CXX -V 2>&1 | grep -i "WorkShop" > /dev/null 2>&1 &&
+           $CXX -c -v -Xc conftest.c > /dev/null 2>&1 &&
+           test -f conftest.o; then
+        if test -z "$ansi"; then
+          ac_cv_prog_cxx_warnings="-v"
+        else
+          ac_cv_prog_cxx_warnings="-v -Xc"
+        fi
+
+      dnl Solaris C compiler (Studio)
+      dnl has warnings by default. not sure if additional warnings (+w)
+      dnl are really useful
+      elif $CXX -V 2>&1 | grep -i "SUN C++ 5" > /dev/null 2>&1 &&
+           $CXX -c -v -Xc conftest.c > /dev/null 2>&1 &&
+           test -f conftest.o; then
+        if test -z "$ansi"; then
+          ac_cv_prog_cxx_warnings=""
+        else
+          ac_cv_prog_cxx_warnings=""
+        fi
+
+      dnl Digital Unix C compiler
+      elif $CXX -V 2>&1 | grep -i "Digital UNIX Compiler" > /dev/null 2>&1 &&
+           $CXX -c -verbose -w0 -warnprotos -std1 conftest.c > /dev/null 2>&1 &&
+           test -f conftest.o; then
+        if test -z "$ansi"; then
+          ac_cv_prog_cxx_warnings="-verbose -w0 -warnprotos"
+        else
+          ac_cv_prog_cxx_warnings="-verbose -w0 -warnprotos -std1"
+        fi
+
+      dnl C for AIX Compiler
+      elif $CXX 2>&1 | grep -i "C for AIX Compiler" > /dev/null 2>&1 &&
+           $CXX -c -qlanglvl=ansi -qinfo=all conftest.c > /dev/null 2>&1 &&
+           test -f conftest.o; then
+        if test -z "$ansi"; then
+          ac_cv_prog_cxx_warnings="-qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd"
+        else
+          ac_cv_prog_cxx_warnings="-qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd -qlanglvl=ansi"
+        fi
+
+      dnl IRIX C compiler
+      elif $CXX -version 2>&1 | grep -i "MIPSpro Compilers" > /dev/null 2>&1 &&
+           $CXX -c -fullwarn -ansi -ansiE conftest.c > /dev/null 2>&1 &&
+           test -f conftest.o; then
+        if test -z "$ansi"; then
+          ac_cv_prog_cxx_warnings="-fullwarn"
+        else
+          ac_cv_prog_cxx_warnings="-fullwarn -ansi -ansiE"
+        fi
+
+      dnl HP-UX C compiler
+      elif what $CXX 2>&1 | grep -i "HP C Compiler" > /dev/null 2>&1 &&
+           $CXX -c -Aa +w1 conftest.c > /dev/null 2>&1 &&
+           test -f conftest.o; then
+        if test -z "$ansi"; then
+          ac_cv_prog_cxx_warnings="+w1"
+        else
+          ac_cv_prog_cxx_warnings="+w1 -Aa"
+        fi
+
+      dnl The NEC SX-5 (Super-UX 10) C compiler
+      elif $CXX -V 2>&1 | grep "/SX" > /dev/null 2>&1 &&
+           $CXX -c -pvctl[,]fullmsg -Xc conftest.c > /dev/null 2>&1 &&
+           test -f conftest.o; then
+        if test -z "$ansi"; then
+          ac_cv_prog_cxx_warnings="-pvctl[,]fullmsg"
+        else
+          ac_cv_prog_cxx_warnings="-pvctl[,]fullmsg -Xc"
+        fi
+
+      dnl The Cray C compiler (Unicos)
+      elif $CXX -V 2>&1 | grep -i "Cray" > /dev/null 2>&1 &&
+           $CXX -c -h msglevel 2 conftest.c > /dev/null 2>&1 &&
+           test -f conftest.o; then
+        if test -z "$ansi"; then
+          ac_cv_prog_cxx_warnings="-h msglevel 2"
+        else
+          ac_cv_prog_cxx_warnings="-h msglevel 2 -h conform"
+        fi
+
+      fi
+      rm -f conftest.*
+    fi
+    if test -n "$ac_cv_prog_cxx_warnings"; then
+      CXXFLAGS="$CXXFLAGS $ac_cv_prog_cxx_warnings"
+    else
+      ac_cv_prog_cxx_warnings="unknown"
+    fi
+  ])
+])dnl