git.m6w6.name Git - m6w6/libmemcached/blob - m4/pandora_warnings.m4

   1 dnl  Copyright (C) 2009 Sun Microsystems
   2 dnl This file is free software; Sun Microsystems
   3 dnl gives unlimited permission to copy and/or distribute it,
   4 dnl with or without modifications, as long as this notice is preserved.
   5
   6 dnl AC_PANDORA_WARNINGS([less-warnings|warnings-always-on])
   7 dnl   less-warnings turn on a limited set of warnings
   8 dnl   warnings-always-on always set warnings=error regardless of tarball/vc
   9
  10 dnl @TODO: remove less-warnings option as soon as Drizzle is clean enough to
  11 dnl        allow it
  12
  13 AC_DEFUN([PANDORA_WARNINGS],[
  14   m4_define([PW_LESS_WARNINGS],[no])
  15   m4_define([PW_WARN_ALWAYS_ON],[no])
  16   ifdef([m4_define],,[define([m4_define],   defn([define]))])
  17   ifdef([m4_undefine],,[define([m4_undefine],   defn([undefine]))])
  18   m4_foreach([pw_arg],[$*],[
  19     m4_case(pw_arg,
  20       [less-warnings],[
  21         m4_undefine([PW_LESS_WARNINGS])
  22         m4_define([PW_LESS_WARNINGS],[yes])
  23       ],
  24       [warnings-always-on],[
  25         m4_undefine([PW_WARN_ALWAYS_ON])
  26         m4_define([PW_WARN_ALWAYS_ON],[yes])
  27     ])
  28   ])
  29
  30   AC_REQUIRE([PANDORA_BUILDING_FROM_VC])
  31   m4_if(PW_WARN_ALWAYS_ON, [yes],
  32     [ac_cv_warnings_as_errors=yes],
  33     AS_IF([test "$ac_cv_building_from_vc" = "yes"],
  34           [ac_cv_warnings_as_errors=yes],
  35           [ac_cv_warnings_as_errors=no]))
  36
  37   AC_ARG_ENABLE([profiling],
  38       [AS_HELP_STRING([--enable-profiling],
  39          [Toggle profiling @<:@default=off@:>@])],
  40       [ac_profiling="$enableval"],
  41       [ac_profiling="no"])
  42
  43   AC_ARG_ENABLE([coverage],
  44       [AS_HELP_STRING([--enable-coverage],
  45          [Toggle coverage @<:@default=off@:>@])],
  46       [ac_coverage="$enableval"],
  47       [ac_coverage="no"])
  48
  49   AS_IF([test "$GCC" = "yes"],[
  50
  51     AS_IF([test "$ac_profiling" = "yes"],[
  52       CC_PROFILING="-pg"
  53       GCOV_LIBS="-pg -lgcov"
  54       save_LIBS="${LIBS}"
  55       LIBS=""
  56       AC_CHECK_LIB(c_p, read)
  57       LIBC_P="${LIBS}"
  58       LIBS="${save_LIBS}"
  59       AC_SUBST(LIBC_P)
  60     ],[
  61       CC_PROFILING=" "
  62     ])
  63
  64     AS_IF([test "$ac_coverage" = "yes"],
  65           [
  66             CC_COVERAGE="--coverage"
  67             GCOV_LIBS="-lgcov"
  68           ])
  69
  70
  71
  72     AS_IF([test "$ac_cv_warnings_as_errors" = "yes"],
  73           [W_FAIL="-Werror"])
  74
  75     AC_CACHE_CHECK([whether it is safe to use -fdiagnostics-show-option],
  76       [ac_cv_safe_to_use_fdiagnostics_show_option_],
  77       [save_CFLAGS="$CFLAGS"
  78        CFLAGS="-fdiagnostics-show-option ${AM_CFLAGS} ${CFLAGS}"
  79        AC_COMPILE_IFELSE(
  80          [AC_LANG_PROGRAM([],[])],
  81          [ac_cv_safe_to_use_fdiagnostics_show_option_=yes],
  82          [ac_cv_safe_to_use_fdiagnostics_show_option_=no])
  83        CFLAGS="$save_CFLAGS"])
  84
  85     AS_IF([test "$ac_cv_safe_to_use_fdiagnostics_show_option_" = "yes"],
  86           [
  87             F_DIAGNOSTICS_SHOW_OPTION="-fdiagnostics-show-option"
  88           ])
  89
  90     AC_CACHE_CHECK([whether it is safe to use -Wconversion],
  91       [ac_cv_safe_to_use_wconversion_],
  92       [save_CFLAGS="$CFLAGS"
  93        dnl Use -Werror here instead of ${W_FAIL} so that we don't spew
  94        dnl conversion warnings to all the tarball folks
  95        CFLAGS="-Wconversion -Werror -pedantic ${AM_CFLAGS} ${CFLAGS}"
  96        AC_COMPILE_IFELSE(
  97          [AC_LANG_PROGRAM([[
  98 #include <stdbool.h>
  99 void foo(bool a)
 100 {
 101   (void)a;
 102 }
 103          ]],[[
 104 foo(0);
 105          ]])],
 106          [ac_cv_safe_to_use_wconversion_=yes],
 107          [ac_cv_safe_to_use_wconversion_=no])
 108        CFLAGS="$save_CFLAGS"])
 109
 110     AS_IF([test "$ac_cv_safe_to_use_wconversion_" = "yes"],
 111       [W_CONVERSION="-Wconversion"
 112       AC_CACHE_CHECK([whether it is safe to use -Wconversion with htons],
 113         [ac_cv_safe_to_use_Wconversion_],
 114         [save_CFLAGS="$CFLAGS"
 115          dnl Use -Werror here instead of ${W_FAIL} so that we don't spew
 116          dnl conversion warnings to all the tarball folks
 117          CFLAGS="-Wconversion -Werror -pedantic ${AM_CFLAGS} ${CFLAGS}"
 118          AC_COMPILE_IFELSE(
 119            [AC_LANG_PROGRAM(
 120              [[
 121 #include <netinet/in.h>
 122              ]],[[
 123 uint16_t x= htons(80);
 124              ]])],
 125            [ac_cv_safe_to_use_Wconversion_=yes],
 126            [ac_cv_safe_to_use_Wconversion_=no])
 127          CFLAGS="$save_CFLAGS"])
 128
 129       AS_IF([test "$ac_cv_safe_to_use_Wconversion_" = "no"],
 130             [NO_CONVERSION="-Wno-conversion"])
 131     ])
 132
 133     NO_STRICT_ALIASING="-fno-strict-aliasing -Wno-strict-aliasing"
 134     NO_SHADOW="-Wno-shadow"
 135
 136     AS_IF([test "$INTELCC" = "yes"],[
 137       m4_if(PW_LESS_WARNINGS,[no],[
 138         BASE_WARNINGS="-w1 -Werror -Wcheck -Wformat -Wp64 -Woverloaded-virtual -Wcast-qual"
 139       ],[
 140         BASE_WARNINGS="-w1 -Wcheck -Wformat -Wp64 -Woverloaded-virtual -Wcast-qual -diag-disable 981"
 141       ])
 142       CC_WARNINGS="${BASE_WARNINGS}"
 143       CXX_WARNINGS="${BASE_WARNINGS}"
 144     ],[
 145       m4_if(PW_LESS_WARNINGS,[no],[
 146         BASE_WARNINGS_FULL="-Wformat=2 ${W_CONVERSION} -Wstrict-aliasing"
 147         CC_WARNINGS_FULL="-Wswitch-default -Wswitch-enum -Wwrite-strings"
 148         CXX_WARNINGS_FULL="-Wold-style-cast"
 149       ],[
 150         BASE_WARNINGS_FULL="-Wformat ${NO_STRICT_ALIASING}"
 151       ])
 152
 153       AS_IF([test "${ac_cv_assert}" = "no"],
 154             [NO_UNUSED="-Wno-unused-variable -Wno-unused-parameter"])
 155
 156       AC_CACHE_CHECK([whether it is safe to use -Wextra],
 157         [ac_cv_safe_to_use_Wextra_],
 158         [save_CFLAGS="$CFLAGS"
 159          CFLAGS="${W_FAIL} -pedantic -Wextra ${AM_CFLAGS} ${CFLAGS}"
 160          AC_COMPILE_IFELSE([
 161            AC_LANG_PROGRAM(
 162            [[
 163 #include <stdio.h>
 164            ]], [[]])
 165         ],
 166         [ac_cv_safe_to_use_Wextra_=yes],
 167         [ac_cv_safe_to_use_Wextra_=no])
 168       CFLAGS="$save_CFLAGS"])
 169
 170       BASE_WARNINGS="${W_FAIL} -pedantic -Wall -Wundef -Wshadow ${NO_UNUSED} ${F_DIAGNOSTICS_SHOW_OPTION} ${CFLAG_VISIBILITY} ${BASE_WARNINGS_FULL}"
 171       AS_IF([test "$ac_cv_safe_to_use_Wextra_" = "yes"],
 172             [BASE_WARNINGS="${BASE_WARNINGS} -Wextra"],
 173             [BASE_WARNINGS="${BASE_WARNINGS} -W"])
 174
 175       CC_WARNINGS="${BASE_WARNINGS} -Wstrict-prototypes -Wmissing-prototypes -Wredundant-decls -Wmissing-declarations -Wcast-align ${CC_WARNINGS_FULL}"
 176       CXX_WARNINGS="${BASE_WARNINGS} -Woverloaded-virtual -Wnon-virtual-dtor -Wctor-dtor-privacy -Wno-long-long ${CXX_WARNINGS_FULL}"
 177
 178       AC_CACHE_CHECK([whether it is safe to use -Wmissing-declarations from C++],
 179         [ac_cv_safe_to_use_Wmissing_declarations_],
 180         [AC_LANG_PUSH(C++)
 181          save_CXXFLAGS="$CXXFLAGS"
 182          CXXFLAGS="-Werror -pedantic -Wmissing-declarations ${AM_CXXFLAGS}"
 183          AC_COMPILE_IFELSE([
 184            AC_LANG_PROGRAM(
 185            [[
 186 #include <stdio.h>
 187            ]], [[]])
 188         ],
 189         [ac_cv_safe_to_use_Wmissing_declarations_=yes],
 190         [ac_cv_safe_to_use_Wmissing_declarations_=no])
 191         CXXFLAGS="$save_CXXFLAGS"
 192         AC_LANG_POP()
 193       ])
 194       AS_IF([test "$ac_cv_safe_to_use_Wmissing_declarations_" = "yes"],
 195             [CXX_WARNINGS="${CXX_WARNINGS} -Wmissing-declarations"])
 196
 197       AC_CACHE_CHECK([whether it is safe to use -Wlogical-op],
 198         [ac_cv_safe_to_use_Wlogical_op_],
 199         [save_CFLAGS="$CFLAGS"
 200          CFLAGS="${W_FAIL} -pedantic -Wlogical-op ${AM_CFLAGS} ${CFLAGS}"
 201          AC_COMPILE_IFELSE([
 202            AC_LANG_PROGRAM(
 203            [[
 204 #include <stdio.h>
 205            ]], [[]])
 206         ],
 207         [ac_cv_safe_to_use_Wlogical_op_=yes],
 208         [ac_cv_safe_to_use_Wlogical_op_=no])
 209       CFLAGS="$save_CFLAGS"])
 210       AS_IF([test "$ac_cv_safe_to_use_Wlogical_op_" = "yes"],
 211             [CC_WARNINGS="${CC_WARNINGS} -Wlogical-op"])
 212
 213       AC_CACHE_CHECK([whether it is safe to use -Wredundant-decls from C++],
 214         [ac_cv_safe_to_use_Wredundant_decls_],
 215         [AC_LANG_PUSH(C++)
 216          save_CXXFLAGS="${CXXFLAGS}"
 217          CXXFLAGS="${W_FAIL} -pedantic -Wredundant-decls ${AM_CXXFLAGS}"
 218          AC_COMPILE_IFELSE(
 219            [AC_LANG_PROGRAM([
 220 template <typename E> struct C { void foo(); };
 221 template <typename E> void C<E>::foo() { }
 222 template <> void C<int>::foo();
 223             AC_INCLUDES_DEFAULT])],
 224             [ac_cv_safe_to_use_Wredundant_decls_=yes],
 225             [ac_cv_safe_to_use_Wredundant_decls_=no])
 226          CXXFLAGS="${save_CXXFLAGS}"
 227          AC_LANG_POP()])
 228       AS_IF([test "$ac_cv_safe_to_use_Wredundant_decls_" = "yes"],
 229             [CXX_WARNINGS="${CXX_WARNINGS} -Wredundant-decls"],
 230             [CXX_WARNINGS="${CXX_WARNINGS} -Wno-redundant-decls"])
 231
 232       AC_CACHE_CHECK([whether it is safe to use -Wattributes from C++],
 233         [ac_cv_safe_to_use_Wattributes_],
 234         [AC_LANG_PUSH(C++)
 235          save_CXXFLAGS="${CXXFLAGS}"
 236          CXXFLAGS="${W_FAIL} -pedantic -Wattributes -fvisibility=hidden ${AM_CXXFLAGS}"
 237          AC_COMPILE_IFELSE(
 238            [AC_LANG_PROGRAM([
 239 #include <google/protobuf/message.h>
 240 #include <google/protobuf/descriptor.h>
 241
 242
 243 const ::google::protobuf::EnumDescriptor* Table_TableOptions_RowType_descriptor();
 244 enum Table_TableOptions_RowType {
 245   Table_TableOptions_RowType_ROW_TYPE_DEFAULT = 0,
 246   Table_TableOptions_RowType_ROW_TYPE_FIXED = 1,
 247   Table_TableOptions_RowType_ROW_TYPE_DYNAMIC = 2,
 248   Table_TableOptions_RowType_ROW_TYPE_COMPRESSED = 3,
 249   Table_TableOptions_RowType_ROW_TYPE_REDUNDANT = 4,
 250   Table_TableOptions_RowType_ROW_TYPE_COMPACT = 5,
 251   Table_TableOptions_RowType_ROW_TYPE_PAGE = 6
 252 };
 253
 254 namespace google {
 255 namespace protobuf {
 256 template <>
 257 inline const EnumDescriptor* GetEnumDescriptor<Table_TableOptions_RowType>() {
 258   return Table_TableOptions_RowType_descriptor();
 259 }
 260 }
 261 }
 262             ])],
 263             [ac_cv_safe_to_use_Wattributes_=yes],
 264             [ac_cv_safe_to_use_Wattributes_=no])
 265           CXXFLAGS="${save_CXXFLAGS}"
 266           AC_LANG_POP()])
 267       AC_CACHE_CHECK([whether it is safe to use -Wno-attributes],
 268         [ac_cv_safe_to_use_Wno_attributes_],
 269         [save_CFLAGS="$CFLAGS"
 270          CFLAGS="${W_FAIL} -pedantic -Wno_attributes_ ${AM_CFLAGS} ${CFLAGS}"
 271          AC_COMPILE_IFELSE([
 272            AC_LANG_PROGRAM(
 273            [[
 274 #include <stdio.h>
 275            ]], [[]])
 276         ],
 277         [ac_cv_safe_to_use_Wno_attributes_=yes],
 278         [ac_cv_safe_to_use_Wno_attributes_=no])
 279       CFLAGS="$save_CFLAGS"])
 280
 281       dnl GCC 3.4 doesn't have -Wno-attributes, so we can't turn them off
 282       dnl by using that.
 283       AS_IF([test "$ac_cv_safe_to_use_Wattributes_" != "yes"],[
 284         AS_IF([test "$ac_cv_safe_to_use_Wno_attributes_" = "yes"],[
 285           CC_WARNINGS="${CC_WARNINGS} -Wno-attributes"
 286           NO_ATTRIBUTES="-Wno-attributes"])])
 287
 288
 289       NO_REDUNDANT_DECLS="-Wno-redundant-decls"
 290       dnl TODO: Figure out a better way to deal with this:
 291       PROTOSKIP_WARNINGS="-Wno-effc++ -Wno-shadow -Wno-missing-braces ${NO_ATTRIBUTES}"
 292       NO_WERROR="-Wno-error"
 293       INNOBASE_SKIP_WARNINGS="-Wno-shadow -Wno-cast-align"
 294
 295     ])
 296   ])
 297
 298   AS_IF([test "$SUNCC" = "yes"],[
 299
 300     AS_IF([test "$ac_profiling" = "yes"],
 301           [CC_PROFILING="-xinstrument=datarace"])
 302
 303     AS_IF([test "$ac_cv_warnings_as_errors" = "yes"],
 304           [W_FAIL="-errwarn=%all"])
 305
 306     AC_CACHE_CHECK([whether E_PASTE_RESULT_NOT_TOKEN is usable],
 307       [ac_cv_paste_result],
 308       [
 309         save_CFLAGS="${CFLAGS}"
 310         CFLAGS="-errwarn=%all -erroff=E_PASTE_RESULT_NOT_TOKEN ${CFLAGS}"
 311         AC_COMPILE_IFELSE(
 312           [AC_LANG_PROGRAM([
 313             AC_INCLUDES_DEFAULT
 314           ],[
 315             int x= 0;])],
 316           [ac_cv_paste_result=yes],
 317           [ac_cv_paste_result=no])
 318         CFLAGS="${save_CFLAGS}"
 319       ])
 320     AS_IF([test $ac_cv_paste_result = yes],
 321       [W_PASTE_RESULT=",E_PASTE_RESULT_NOT_TOKEN"])
 322
 323
 324     m4_if(PW_LESS_WARNINGS, [no],[
 325       CC_WARNINGS_FULL="-erroff=E_INTEGER_OVERFLOW_DETECTED${W_PASTE_RESULT}"
 326       CXX_WARNINGS_FULL="-erroff=inllargeuse"
 327     ],[
 328       CC_WARNINGS_FULL="-erroff=E_ATTRIBUTE_NOT_VAR"
 329       CXX_WARNINGS_FULL="-erroff=attrskipunsup,doubunder,reftotemp,inllargeuse,truncwarn1,signextwarn,inllargeint"
 330     ])
 331
 332     CC_WARNINGS="-v -errtags=yes ${W_FAIL} ${CC_WARNINGS_FULL} ${CFLAG_VISIBILITY}"
 333     CXX_WARNINGS="+w +w2 -xwe -xport64 -errtags=yes ${CXX_WARNINGS_FULL} ${W_FAIL} ${CFLAG_VISIBILITY}"
 334     PROTOSKIP_WARNINGS="-erroff=attrskipunsup,doubunder,reftotemp,wbadinitl,identexpected,inllargeuse,truncwarn1,signextwarn,partinit,notused,badargtype2w,wbadinit"
 335     NO_UNREACHED="-erroff=E_STATEMENT_NOT_REACHED"
 336     NO_WERROR="-errwarn=%none"
 337
 338   ])
 339
 340   AC_SUBST(NO_CONVERSION)
 341   AC_SUBST(NO_REDUNDANT_DECLS)
 342   AC_SUBST(NO_UNREACHED)
 343   AC_SUBST(NO_SHADOW)
 344   AC_SUBST(NO_STRICT_ALIASING)
 345   AC_SUBST(PROTOSKIP_WARNINGS)
 346   AC_SUBST(INNOBASE_SKIP_WARNINGS)
 347   AC_SUBST(NO_WERROR)
 348   AC_SUBST([GCOV_LIBS])
 349
 350 ])