+ AC_CACHE_CHECK([whether it is safe to use -fdiagnostics-show-option],
+ [ac_cv_safe_to_use_fdiagnostics_show_option_],
+ [save_CFLAGS="$CFLAGS"
+ CFLAGS="-fdiagnostics-show-option ${CFLAGS}"
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([],[])],
+ [ac_cv_safe_to_use_fdiagnostics_show_option_=yes],
+ [ac_cv_safe_to_use_fdiagnostics_show_option_=no])
+ CFLAGS="$save_CFLAGS"])
+
+ AS_IF([test "$ac_cv_safe_to_use_fdiagnostics_show_option_" = "yes"],
+ [
+ F_DIAGNOSTICS_SHOW_OPTION="-fdiagnostics-show-option"
+ ])
+
+ AC_CACHE_CHECK([whether it is safe to use -Wconversion],
+ [ac_cv_safe_to_use_wconversion_],
+ [save_CFLAGS="$CFLAGS"
+ CFLAGS="-Werror -Wconversion ${CFLAGS}"
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <stdbool.h>
+void foo(bool a)
+{
+ (void)a;
+}
+ ]],[[
+foo(0);
+ ]])],
+ [ac_cv_safe_to_use_wconversion_=yes],
+ [ac_cv_safe_to_use_wconversion_=no])
+ CFLAGS="$save_CFLAGS"])
+
+ AS_IF([test "$ac_cv_safe_to_use_wconversion_" = "yes"],
+ [W_CONVERSION="-Wconversion"
+ AC_CACHE_CHECK([whether it is safe to use -Wconversion with htons],
+ [ac_cv_safe_to_use_Wconversion_],
+ [save_CFLAGS="$CFLAGS"
+ CFLAGS="-Werror -Wconversion ${CFLAGS}"
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[
+#include <netinet/in.h>
+ ]],[[
+uint16_t x= htons(80);
+ ]])],
+ [ac_cv_safe_to_use_Wconversion_=yes],
+ [ac_cv_safe_to_use_Wconversion_=no])
+ CFLAGS="$save_CFLAGS"])
+
+ AS_IF([test "$ac_cv_safe_to_use_Wconversion_" = "no"],
+ [
+ NO_CONVERSION="-Wno-conversion"
+ ])
+ ])
+
+ AS_IF([test "$ac_profiling" = "yes"],
+ [CC_PROFILING="-pg"])
+
+ AS_IF([test "$ac_coverage" = "yes"],
+ [CC_COVERAGE="-fprofile-arcs -ftest-coverage"])
+
+ AS_IF([test "$building_from_bzr" = "yes"],
+ [W_FAIL="-Werror"])
+
+ BASE_WARNINGS="-pedantic -Wall -Wextra ${W_FAIL} -Wundef -Wshadow -Wmissing-declarations -Wstrict-aliasing -Wformat=2 ${F_DIAGNOSTICS_SHOW_OPTION} ${W_CONVERSION}"
+ CC_WARNINGS="${BASE_WARNINGS} -Wstrict-prototypes -Wmissing-prototypes -Wredundant-decls -Wswitch-default -Wswitch-enum -Wcast-align"
+ CXX_WARNINGS="${BASE_WARNINGS} -Woverloaded-virtual -Wnon-virtual-dtor -Wctor-dtor-privacy -Wold-style-cast -Weffc++ -Wno-long-long"
+
+ AC_CACHE_CHECK([whether it is safe to use -Wlogical-op],
+ [ac_cv_safe_to_use_Wlogical_op_],
+ [save_CFLAGS="$CFLAGS"
+ CFLAGS="-Wlogical-op"
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM(
+ [[
+#include <stdio>
+ ]], [[]])
+ ],
+ [ac_cv_safe_to_use_Wlogical_op_=yes],
+ [ac_cv_safe_to_use_Wlogical_op_=no])
+ CFLAGS="$save_CFLAGS"])
+ AS_IF([test "$ac_cv_safe_to_use_Wlogical_op_" = "yes"],
+ [CC_WARNINGS="${CC_WARNINGS} -Wlogical-op"])
+
+ AC_CACHE_CHECK([whether it is safe to use -Wredundant-decls from C++],
+ [ac_cv_safe_to_use_Wredundant_decls_],
+ [AC_LANG_PUSH(C++)
+ save_CXXFLAGS="${CXXFLAGS}"
+ CXXFLAGS="${CXXFLAGS} ${W_FAIL} -Wredundant-decls"
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([
+template <typename E> struct C { void foo(); };
+template <typename E> void C<E>::foo() { }
+template <> void C<int>::foo();
+ AC_INCLUDES_DEFAULT])],
+ [ac_cv_safe_to_use_Wredundant_decls_=yes],
+ [ac_cv_safe_to_use_Wredundant_decls_=no])
+ CXXFLAGS="${save_CXXFLAGS}"
+ AC_LANG_POP()])
+ AS_IF([test "$ac_cv_safe_to_use_Wredundant_decls_" = "yes"],
+ [CXX_WARNINGS="${CXX_WARNINGS} -Wredundant-decls"],
+ [CXX_WARNINGS="${CXX_WARNINGS} -Wno-redundant-decls"])
+
+ NO_REDUNDANT_DECLS="-Wno-redundant-decls"
+fi
+if test "$SUNCC" = "yes"
+then
+
+ AS_IF([test "$ac_profiling" = "yes"],
+ [CC_PROFILING="-xinstrument=datarace"])
+
+ AS_IF([test "$building_from_bzr" = "yes"],
+ [W_FAIL="-errwarn=%all"])
+
+ AC_CACHE_CHECK([whether E_PASTE_RESULT_NOT_TOKEN is usable],
+ [ac_cv_paste_result],
+ [
+ save_CFLAGS="${CFLAGS}"
+ CFLAGS="-errwarn=%all -erroff=E_PASTE_RESULT_NOT_TOKEN ${CFLAGS}"
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([
+ AC_INCLUDES_DEFAULT
+ ],[
+ int x= 0;])],
+ [ac_cv_paste_result=yes],
+ [ac_cv_paste_result=no])
+ CFLAGS="${save_CFLAGS}"
+ ])
+ AS_IF([test $ac_cv_paste_result = yes],
+ [W_PASTE_RESULT=",E_PASTE_RESULT_NOT_TOKEN"])
+
+
+ CC_WARNINGS="-v -errtags=yes ${W_FAIL} -erroff=E_INTEGER_OVERFLOW_DETECTED${W_PASTE_RESULT}"
+ CXX_WARNINGS="+w +w2 -xwe -xport64 -errtags=yes ${W_FAIL}"