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Merge pull request #5297 from FedericoYundt/patch-1
[thirdparty/cups.git] / config-scripts / cups-compiler.m4
CommitLineData
ef416fc2 1dnl
5a1d7a17 2dnl Compiler stuff for CUPS.
ef416fc2 3dnl
105922ec 4dnl Copyright 2007-2017 by Apple Inc.
5a1d7a17 5dnl Copyright 1997-2007 by Easy Software Products, all rights reserved.
ef416fc2 6dnl
e3101897 7dnl Licensed under Apache License v2.0. See the file "LICENSE" for more information.
ef416fc2 8dnl
9
10dnl Clear the debugging and non-shared library options unless the user asks
11dnl for them...
50fe7201 12INSTALL_STRIP=""
ef416fc2 13OPTIM=""
50fe7201 14AC_SUBST(INSTALL_STRIP)
ef416fc2 15AC_SUBST(OPTIM)
16
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17AC_ARG_WITH(optim, [ --with-optim set optimization flags ])
18AC_ARG_ENABLE(debug, [ --enable-debug build with debugging symbols])
19AC_ARG_ENABLE(debug_guards, [ --enable-debug-guards build with memory allocation guards])
20AC_ARG_ENABLE(debug_printfs, [ --enable-debug-printfs build with CUPS_DEBUG_LOG support])
21AC_ARG_ENABLE(unit_tests, [ --enable-unit-tests build and run unit tests])
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22
23dnl For debugging, keep symbols, otherwise strip them...
24if test x$enable_debug = xyes; then
25 OPTIM="-g"
26else
27 INSTALL_STRIP="-s"
28fi
ef416fc2 29
5f64df29 30dnl Debug printfs can slow things down, so provide a separate option for that
52f6f666 31if test x$enable_debug_printfs = xyes; then
5f64df29 32 CFLAGS="$CFLAGS -DDEBUG"
94da7e34 33 CXXFLAGS="$CXXFLAGS -DDEBUG"
5f64df29
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34fi
35
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36dnl Debug guards use an extra 4 bytes for some structures like strings in the
37dnl string pool, so provide a separate option for that
38if test x$enable_debug_guards = xyes; then
39 CFLAGS="$CFLAGS -DDEBUG_GUARDS"
94da7e34 40 CXXFLAGS="$CXXFLAGS -DDEBUG_GUARDS"
745129be
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41fi
42
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43dnl Unit tests take up time during a compile...
44if test x$enable_unit_tests = xyes; then
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45 if test "$build" != "$host"; then
46 AC_MSG_ERROR([Sorry, cannot build unit tests when cross-compiling.])
47 fi
48
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49 UNITTESTS="unittests"
50else
51 UNITTESTS=""
52fi
53AC_SUBST(UNITTESTS)
54
ed486911 55dnl Setup general architecture flags...
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56AC_ARG_WITH(archflags, [ --with-archflags set default architecture flags ])
57AC_ARG_WITH(ldarchflags, [ --with-ldarchflags set program architecture flags ])
ed486911 58
59if test -z "$with_archflags"; then
60 ARCHFLAGS=""
61else
62 ARCHFLAGS="$with_archflags"
a603edef
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63fi
64
65if test -z "$with_ldarchflags"; then
105922ec 66 if test "$host_os_name" = darwin; then
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67 # Only create Intel programs by default
68 LDARCHFLAGS="`echo $ARCHFLAGS | sed -e '1,$s/-arch ppc64//'`"
09a101d6 69 else
70 LDARCHFLAGS="$ARCHFLAGS"
71 fi
a603edef 72else
839a51c8 73 LDARCHFLAGS="$with_ldarchflags"
ed486911 74fi
75
76AC_SUBST(ARCHFLAGS)
09a101d6 77AC_SUBST(LDARCHFLAGS)
ed486911 78
f7deaa1a 79dnl Read-only data/program support on Linux...
bf3816c7 80AC_ARG_ENABLE(relro, [ --enable-relro build with the GCC relro option])
f7deaa1a 81
ef416fc2 82dnl Update compiler options...
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83CXXLIBS="${CXXLIBS:=}"
84AC_SUBST(CXXLIBS)
85
a74454a7 86PIEFLAGS=""
87AC_SUBST(PIEFLAGS)
88
f7deaa1a 89RELROFLAGS=""
90AC_SUBST(RELROFLAGS)
91
ef416fc2 92if test -n "$GCC"; then
2abf387c 93 # Add GCC-specific compiler options...
ef416fc2 94 if test -z "$OPTIM"; then
95 if test "x$with_optim" = x; then
96 # Default to optimize-for-size and debug
97 OPTIM="-Os -g"
98 else
99 OPTIM="$with_optim $OPTIM"
100 fi
101 fi
102
a4924f6c 103 # Generate position-independent code as needed...
5a1d7a17 104 if test $PICFLAG = 1; then
ef416fc2 105 OPTIM="-fPIC $OPTIM"
106 fi
107
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108 # The -fstack-protector option is available with some versions of
109 # GCC and adds "stack canaries" which detect when the return address
110 # has been overwritten, preventing many types of exploit attacks.
9483577f 111 AC_MSG_CHECKING(whether compiler supports -fstack-protector)
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112 OLDCFLAGS="$CFLAGS"
113 CFLAGS="$CFLAGS -fstack-protector"
68b10830 114 AC_TRY_LINK(,,
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115 if test "x$LSB_BUILD" = xy; then
116 # Can't use stack-protector with LSB binaries...
117 OPTIM="$OPTIM -fno-stack-protector"
118 else
119 OPTIM="$OPTIM -fstack-protector"
120 fi
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121 AC_MSG_RESULT(yes),
122 AC_MSG_RESULT(no))
123 CFLAGS="$OLDCFLAGS"
124
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125 if test "x$LSB_BUILD" != xy; then
126 # The -fPIE option is available with some versions of GCC and
127 # adds randomization of addresses, which avoids another class of
128 # exploits that depend on a fixed address for common functions.
129 #
130 # Not available to LSB binaries...
9483577f 131 AC_MSG_CHECKING(whether compiler supports -fPIE)
db8b865d 132 OLDCFLAGS="$CFLAGS"
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133 case "$host_os_name" in
134 darwin*)
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135 CFLAGS="$CFLAGS -fPIE -Wl,-pie"
136 AC_TRY_COMPILE(,,[
137 PIEFLAGS="-fPIE -Wl,-pie"
138 AC_MSG_RESULT(yes)],
139 AC_MSG_RESULT(no))
140 ;;
141
142 *)
143 CFLAGS="$CFLAGS -fPIE -pie"
144 AC_TRY_COMPILE(,,[
145 PIEFLAGS="-fPIE -pie"
146 AC_MSG_RESULT(yes)],
147 AC_MSG_RESULT(no))
148 ;;
149 esac
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150 CFLAGS="$OLDCFLAGS"
151 fi
ef416fc2 152
153 if test "x$with_optim" = x; then
154 # Add useful warning options for tracking down problems...
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155 OPTIM="-Wall -Wno-format-y2k -Wunused $OPTIM"
156
157 AC_MSG_CHECKING(whether compiler supports -Wno-unused-result)
158 OLDCFLAGS="$CFLAGS"
159 CFLAGS="$CFLAGS -Werror -Wno-unused-result"
160 AC_TRY_COMPILE(,,
161 [OPTIM="$OPTIM -Wno-unused-result"
162 AC_MSG_RESULT(yes)],
163 AC_MSG_RESULT(no))
164 CFLAGS="$OLDCFLAGS"
7e86f2f6 165
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166 AC_MSG_CHECKING(whether compiler supports -Wsign-conversion)
167 OLDCFLAGS="$CFLAGS"
168 CFLAGS="$CFLAGS -Werror -Wsign-conversion"
169 AC_TRY_COMPILE(,,
170 [OPTIM="$OPTIM -Wsign-conversion"
171 AC_MSG_RESULT(yes)],
172 AC_MSG_RESULT(no))
173 CFLAGS="$OLDCFLAGS"
174
175 AC_MSG_CHECKING(whether compiler supports -Wno-tautological-compare)
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176 OLDCFLAGS="$CFLAGS"
177 CFLAGS="$CFLAGS -Werror -Wno-tautological-compare"
178 AC_TRY_COMPILE(,,
179 [OPTIM="$OPTIM -Wno-tautological-compare"
180 AC_MSG_RESULT(yes)],
181 AC_MSG_RESULT(no))
182 CFLAGS="$OLDCFLAGS"
f228370c 183
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184 AC_MSG_CHECKING(whether compiler supports -Wno-format-truncation)
185 OLDCFLAGS="$CFLAGS"
186 CFLAGS="$CFLAGS -Werror -Wno-format-truncation"
187 AC_TRY_COMPILE(,,
188 [OPTIM="$OPTIM -Wno-format-truncation"
189 AC_MSG_RESULT(yes)],
190 AC_MSG_RESULT(no))
191 CFLAGS="$OLDCFLAGS"
192
a4924f6c 193 # Additional warning options for development testing...
d9bca400 194 if test -d .svn; then
7e86f2f6 195 OPTIM="-Werror $OPTIM"
d9bca400 196 fi
ef416fc2 197 fi
e1d6a774 198
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199 case "$host_os_name" in
200 darwin*)
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201 # -D_FORTIFY_SOURCE=2 adds additional object size
202 # checking, basically wrapping all string functions
203 # with buffer-limited ones. Not strictly needed for
204 # CUPS since we already use buffer-limited calls, but
22c9029b 205 # this will catch any additions that are broken.
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206 CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
207 ;;
208
105922ec 209 linux*)
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210 # The -z relro option is provided by the Linux linker command to
211 # make relocatable data read-only.
212 if test x$enable_relro = xyes; then
9ee955fe 213 RELROFLAGS="-Wl,-z,relro,-z,now"
a4924f6c 214 fi
e1d6a774 215 ;;
216 esac
ef416fc2 217else
2abf387c 218 # Add vendor-specific compiler options...
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219 case $host_os_name in
220 sunos*)
ef416fc2 221 # Solaris
222 if test -z "$OPTIM"; then
223 if test "x$with_optim" = x; then
ed486911 224 OPTIM="-xO2"
ef416fc2 225 else
226 OPTIM="$with_optim $OPTIM"
227 fi
228 fi
229
ef416fc2 230 if test $PICFLAG = 1; then
231 OPTIM="-KPIC $OPTIM"
232 fi
233 ;;
234 *)
235 # Running some other operating system; inform the user they
236 # should contribute the necessary options to
237 # cups-support@cups.org...
238 echo "Building CUPS with default compiler optimizations; contact"
9483577f 239 echo "cups-devel@cups.org with uname and compiler options needed"
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240 echo "for your platform, or set the CFLAGS and LDFLAGS environment"
241 echo "variables before running configure."
ef416fc2 242 ;;
243 esac
244fi
245
2abf387c 246# Add general compiler options per platform...
105922ec
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247case $host_os_name in
248 linux*)
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249 # glibc 2.8 and higher breaks peer credentials unless you
250 # define _GNU_SOURCE...
251 OPTIM="$OPTIM -D_GNU_SOURCE"
252 ;;
2abf387c 253esac