Merge Monty
[m6w6/libmemcached] / 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 save_LIBS="${LIBS}"
54 LIBS=""
55 AC_CHECK_LIB(c_p, read)
56 LIBC_P="${LIBS}"
57 LIBS="${save_LIBS}"
58 AC_SUBST(LIBC_P)
59 ],[
60 CC_PROFILING=" "
61 ])
62
63 AS_IF([test "$ac_coverage" = "yes"],
64 [CC_COVERAGE="-fprofile-arcs -ftest-coverage"])
65
66 AS_IF([test "$ac_cv_warnings_as_errors" = "yes"],
67 [W_FAIL="-Werror"])
68
69 AC_CACHE_CHECK([whether it is safe to use -fdiagnostics-show-option],
70 [ac_cv_safe_to_use_fdiagnostics_show_option_],
71 [save_CFLAGS="$CFLAGS"
72 CFLAGS="-fdiagnostics-show-option ${AM_CFLAGS} ${CFLAGS}"
73 AC_COMPILE_IFELSE(
74 [AC_LANG_PROGRAM([],[])],
75 [ac_cv_safe_to_use_fdiagnostics_show_option_=yes],
76 [ac_cv_safe_to_use_fdiagnostics_show_option_=no])
77 CFLAGS="$save_CFLAGS"])
78
79 AS_IF([test "$ac_cv_safe_to_use_fdiagnostics_show_option_" = "yes"],
80 [
81 F_DIAGNOSTICS_SHOW_OPTION="-fdiagnostics-show-option"
82 ])
83
84 AC_CACHE_CHECK([whether it is safe to use -Wconversion],
85 [ac_cv_safe_to_use_wconversion_],
86 [save_CFLAGS="$CFLAGS"
87 dnl Use -Werror here instead of ${W_FAIL} so that we don't spew
88 dnl conversion warnings to all the tarball folks
89 CFLAGS="-Wconversion -Werror -pedantic ${AM_CFLAGS} ${CFLAGS}"
90 AC_COMPILE_IFELSE(
91 [AC_LANG_PROGRAM([[
92 #include <stdbool.h>
93 void foo(bool a)
94 {
95 (void)a;
96 }
97 ]],[[
98 foo(0);
99 ]])],
100 [ac_cv_safe_to_use_wconversion_=yes],
101 [ac_cv_safe_to_use_wconversion_=no])
102 CFLAGS="$save_CFLAGS"])
103
104 AS_IF([test "$ac_cv_safe_to_use_wconversion_" = "yes"],
105 [W_CONVERSION="-Wconversion"
106 AC_CACHE_CHECK([whether it is safe to use -Wconversion with htons],
107 [ac_cv_safe_to_use_Wconversion_],
108 [save_CFLAGS="$CFLAGS"
109 dnl Use -Werror here instead of ${W_FAIL} so that we don't spew
110 dnl conversion warnings to all the tarball folks
111 CFLAGS="-Wconversion -Werror -pedantic ${AM_CFLAGS} ${CFLAGS}"
112 AC_COMPILE_IFELSE(
113 [AC_LANG_PROGRAM(
114 [[
115 #include <netinet/in.h>
116 ]],[[
117 uint16_t x= htons(80);
118 ]])],
119 [ac_cv_safe_to_use_Wconversion_=yes],
120 [ac_cv_safe_to_use_Wconversion_=no])
121 CFLAGS="$save_CFLAGS"])
122
123 AS_IF([test "$ac_cv_safe_to_use_Wconversion_" = "no"],
124 [NO_CONVERSION="-Wno-conversion"])
125 ])
126
127 NO_STRICT_ALIASING="-fno-strict-aliasing -Wno-strict-aliasing"
128 NO_SHADOW="-Wno-shadow"
129
130 AS_IF([test "$INTELCC" = "yes"],[
131 m4_if(PW_LESS_WARNINGS,[no],[
132 BASE_WARNINGS="-w1 -Wall -Werror -Wcheck -Wformat -Wp64 -Woverloaded-virtual -Wcast-qual"
133 ],[
134 BASE_WARNINGS="-w1 -Wall -Wcheck -Wformat -Wp64 -Woverloaded-virtual -Wcast-qual -diag-disable 981"
135 ])
136 CC_WARNINGS="${BASE_WARNINGS}"
137 CXX_WARNINGS="${BASE_WARNINGS}"
138 ],[
139 m4_if(PW_LESS_WARNINGS,[no],[
140 BASE_WARNINGS_FULL="-Wformat=2 ${W_CONVERSION} -Wstrict-aliasing"
141 CC_WARNINGS_FULL="-Wswitch-default -Wswitch-enum -Wwrite-strings"
142 CXX_WARNINGS_FULL="-Weffc++ -Wold-style-cast"
143 ],[
144 BASE_WARNINGS_FULL="-Wformat ${NO_STRICT_ALIASING}"
145 ])
146
147 AS_IF([test "${ac_cv_assert}" = "no"],
148 [NO_UNUSED="-Wno-unused-variable -Wno-unused-parameter"])
149
150 BASE_WARNINGS="${W_FAIL} -pedantic -Wall -Wextra -Wundef -Wshadow ${NO_UNUSED} ${F_DIAGNOSTICS_SHOW_OPTION} ${CFLAG_VISIBILITY} ${BASE_WARNINGS_FULL}"
151 CC_WARNINGS="${BASE_WARNINGS} -Wstrict-prototypes -Wmissing-prototypes -Wredundant-decls -Wmissing-declarations -Wcast-align ${CC_WARNINGS_FULL}"
152 CXX_WARNINGS="${BASE_WARNINGS} -Woverloaded-virtual -Wnon-virtual-dtor -Wctor-dtor-privacy -Wno-long-long ${CXX_WARNINGS_FULL}"
153
154 AC_CACHE_CHECK([whether it is safe to use -Wmissing-declarations from C++],
155 [ac_cv_safe_to_use_Wmissing_declarations_],
156 [AC_LANG_PUSH(C++)
157 save_CXXFLAGS="$CXXFLAGS"
158 CXXFLAGS="-Werror -pedantic -Wmissing-declarations ${AM_CXXFLAGS}"
159 AC_COMPILE_IFELSE([
160 AC_LANG_PROGRAM(
161 [[
162 #include <stdio.h>
163 ]], [[]])
164 ],
165 [ac_cv_safe_to_use_Wmissing_declarations_=yes],
166 [ac_cv_safe_to_use_Wmissing_declarations_=no])
167 CXXFLAGS="$save_CXXFLAGS"
168 AC_LANG_POP()
169 ])
170 AS_IF([test "$ac_cv_safe_to_use_Wmissing_declarations_" = "yes"],
171 [CXX_WARNINGS="${CXX_WARNINGS} -Wmissing-declarations"])
172
173 AC_CACHE_CHECK([whether it is safe to use -Wlogical-op],
174 [ac_cv_safe_to_use_Wlogical_op_],
175 [save_CFLAGS="$CFLAGS"
176 CFLAGS="${W_FAIL} -pedantic -Wlogical-op ${AM_CFLAGS} ${CFLAGS}"
177 AC_COMPILE_IFELSE([
178 AC_LANG_PROGRAM(
179 [[
180 #include <stdio.h>
181 ]], [[]])
182 ],
183 [ac_cv_safe_to_use_Wlogical_op_=yes],
184 [ac_cv_safe_to_use_Wlogical_op_=no])
185 CFLAGS="$save_CFLAGS"])
186 AS_IF([test "$ac_cv_safe_to_use_Wlogical_op_" = "yes"],
187 [CC_WARNINGS="${CC_WARNINGS} -Wlogical-op"])
188
189 AC_CACHE_CHECK([whether it is safe to use -Wredundant-decls from C++],
190 [ac_cv_safe_to_use_Wredundant_decls_],
191 [AC_LANG_PUSH(C++)
192 save_CXXFLAGS="${CXXFLAGS}"
193 CXXFLAGS="${W_FAIL} -pedantic -Wredundant-decls ${AM_CXXFLAGS}"
194 AC_COMPILE_IFELSE(
195 [AC_LANG_PROGRAM([
196 template <typename E> struct C { void foo(); };
197 template <typename E> void C<E>::foo() { }
198 template <> void C<int>::foo();
199 AC_INCLUDES_DEFAULT])],
200 [ac_cv_safe_to_use_Wredundant_decls_=yes],
201 [ac_cv_safe_to_use_Wredundant_decls_=no])
202 CXXFLAGS="${save_CXXFLAGS}"
203 AC_LANG_POP()])
204 AS_IF([test "$ac_cv_safe_to_use_Wredundant_decls_" = "yes"],
205 [CXX_WARNINGS="${CXX_WARNINGS} -Wredundant-decls"],
206 [CXX_WARNINGS="${CXX_WARNINGS} -Wno-redundant-decls"])
207
208 NO_REDUNDANT_DECLS="-Wno-redundant-decls"
209 PROTOSKIP_WARNINGS="-Wno-effc++ -Wno-shadow"
210
211 ])
212 ])
213
214 AS_IF([test "$SUNCC" = "yes"],[
215
216 AS_IF([test "$ac_profiling" = "yes"],
217 [CC_PROFILING="-xinstrument=datarace"])
218
219 AS_IF([test "$ac_cv_warnings_as_errors" = "yes"],
220 [W_FAIL="-errwarn=%all"])
221
222 AC_CACHE_CHECK([whether E_PASTE_RESULT_NOT_TOKEN is usable],
223 [ac_cv_paste_result],
224 [
225 save_CFLAGS="${CFLAGS}"
226 CFLAGS="-errwarn=%all -erroff=E_PASTE_RESULT_NOT_TOKEN ${CFLAGS}"
227 AC_COMPILE_IFELSE(
228 [AC_LANG_PROGRAM([
229 AC_INCLUDES_DEFAULT
230 ],[
231 int x= 0;])],
232 [ac_cv_paste_result=yes],
233 [ac_cv_paste_result=no])
234 CFLAGS="${save_CFLAGS}"
235 ])
236 AS_IF([test $ac_cv_paste_result = yes],
237 [W_PASTE_RESULT=",E_PASTE_RESULT_NOT_TOKEN"])
238
239
240 m4_if(PW_LESS_WARNINGS, [no],[
241 CC_WARNINGS_FULL="-erroff=E_INTEGER_OVERFLOW_DETECTED${W_PASTE_RESULT}"
242 CXX_WARNINGS_FULL="-erroff=inllargeuse"
243 ],[
244 CC_WARNINGS_FULL="-erroff=E_ATTRIBUTE_NOT_VAR"
245 CXX_WARNINGS_FULL="-erroff=attrskipunsup,doubunder,reftotemp,inllargeuse,truncwarn1,signextwarn,inllargeint"
246 ])
247
248 CC_WARNINGS="-v -errtags=yes ${W_FAIL} ${CC_WARNINGS_FULL}"
249 CXX_WARNINGS="+w +w2 -xwe -xport64 -errtags=yes ${CXX_WARNINGS_FULL} ${W_FAIL}"
250 PROTOSKIP_WARNINGS="-erroff=attrskipunsup,doubunder,reftotemp,wbadinitl,identexpected,inllargeuse,truncwarn1,signextwarn"
251 NO_UNREACHED="-erroff=E_STATEMENT_NOT_REACHED"
252
253 ])
254
255 AC_SUBST(NO_CONVERSION)
256 AC_SUBST(NO_REDUNDANT_DECLS)
257 AC_SUBST(NO_UNREACHED)
258 AC_SUBST(NO_SHADOW)
259 AC_SUBST(NO_STRICT_ALIASING)
260 AC_SUBST(PROTOSKIP_WARNINGS)
261
262 ])