1 dnl Process this file with autoconf 2.63 or later to produce
2 dnl a configure script.
4 AC_INIT(config/config.h.in)
5 AC_CONFIG_HEADERS(config/config.h)
7 AC_PREFIX_PROGRAM(nasm)
9 dnl Save initial CFLAGS, to see if -g -O2 came from configure or not
10 pa_init_cflags="$CFLAGS"
12 dnl This prevents us from running Wine and thinking we are not
13 dnl cross-compiling when in fact we are; running Wine here is at
14 dnl the best very slow and doesn't buy us a single thing at all.
18 dnl Checks for programs and enable necessary CC extensions
19 AC_USE_SYSTEM_EXTENSIONS
27 dnl If the user did not specify a CFLAGS default, change default -O2
28 dnl to either -O3 (normal) or -O0 (for debugging)
29 PA_ARG_DISABLED([optimization],
30 [compile without optimization (-O0) to help debugging],
31 [pa_optimize=-O0], [pa_optimize=-O3])
32 AS_IF([test x"$pa_init_cflags" = x],
33 [CFLAGS=`echo "$CFLAGS" | sed -e "s/-O2/$pa_optimize/"`])
35 dnl Check for library extension
38 dnl Checks for typedefs, structures, and compiler characteristics.
43 AC_C_BIGENDIAN(AC_DEFINE(WORDS_BIGENDIAN),AC_DEFINE(WORDS_LITTLEENDIAN),,)
44 AH_TEMPLATE(WORDS_BIGENDIAN,
45 [Define to 1 if your processor stores words with the most significant
46 byte first (like Motorola and SPARC, unlike Intel and VAX).])
47 AH_TEMPLATE(WORDS_LITTLEENDIAN,
48 [Define to 1 if your processor stores words with the least significant
49 byte first (like Intel and VAX, unlike Motorola and SPARC).])
51 dnl Force gcc and gcc-compatible compilers treat signed integers
53 PA_ADD_CFLAGS([-fwrapv])
55 dnl Some environments abuse __STRICT_ANSI__ to disable some
56 dnl function declarations
57 PA_ADD_CFLAGS([-U__STRICT_ANSI__])
59 dnl Don't put things in common if we can avoid it. We don't want to
60 dnl assume all compilers support common, and this will help find those
61 dnl problems. This also works around an OSX linker problem.
62 PA_ADD_CFLAGS([-fno-common])
64 dnl Look for programs...
65 AC_CHECK_PROGS(NROFF, nroff, false)
66 AC_CHECK_PROGS(ASCIIDOC, asciidoc, false)
67 AC_CHECK_PROGS(XMLTO, xmlto, false)
69 dnl Check for progs needed for manpage generation
70 AS_IF([test $ASCIIDOC = false],
71 [AC_MSG_WARN([No asciidoc package found])]
73 AS_IF([test $XMLTO = false],
74 [AC_MSG_WARN([No xmlto package found])]
77 dnl Check for host compiler tools
79 AC_CHECK_TOOL(RANLIB, ranlib, :)
80 AC_CHECK_TOOL(STRIP, strip)
82 dnl Checks for header files.
84 AC_CHECK_HEADERS(inttypes.h)
85 AC_CHECK_HEADERS(strings.h)
87 AC_CHECK_HEADERS(stdnoreturn.h)
88 AC_CHECK_HEADERS(io.h)
89 AC_CHECK_HEADERS(fcntl.h)
90 AC_CHECK_HEADERS(unistd.h)
91 AC_CHECK_HEADERS(sys/param.h)
92 AC_CHECK_HEADERS(sys/mman.h)
93 AC_CHECK_HEADERS(sys/types.h)
94 AC_CHECK_HEADERS(sys/stat.h)
96 dnl Checks for library functions.
97 AC_CHECK_FUNCS(strcasecmp stricmp)
98 AC_CHECK_FUNCS(strncasecmp strnicmp)
99 AC_CHECK_FUNCS(strsep)
100 AC_CHECK_FUNCS(strnlen)
102 AC_CHECK_FUNCS(getuid)
103 AC_CHECK_FUNCS(getgid)
105 AC_CHECK_FUNCS(realpath)
106 AC_CHECK_FUNCS(canonicalize_file_name)
107 AC_CHECK_FUNCS(_fullpath)
108 AC_CHECK_FUNCS(pathconf)
111 AC_CHECK_FUNCS([_fseeki64])
112 AC_CHECK_FUNCS([ftruncate _chsize _chsize_s])
113 AC_CHECK_FUNCS([fileno _fileno])
115 AC_CHECK_FUNCS(_filelengthi64)
117 AC_CHECK_FUNCS(getpagesize)
118 AC_CHECK_FUNCS(sysconf)
120 AC_CHECK_FUNCS([access _access faccessat])
122 PA_HAVE_FUNC(__builtin_clz, (0U))
123 PA_HAVE_FUNC(__builtin_clzl, (0UL))
124 PA_HAVE_FUNC(__builtin_clzll, (0ULL))
125 PA_HAVE_FUNC(__builtin_expect, (1,1))
127 dnl Functions for which we have replacements available in lib/
128 AC_CHECK_FUNCS([vsnprintf _vsnprintf])
129 AC_CHECK_FUNCS([snprintf _snprintf])
130 AC_CHECK_FUNCS([strlcpy])
132 dnl These types are POSIX-specific, and Windows does it differently...
133 AC_CHECK_TYPES([struct _stati64])
134 AC_CHECK_TYPES([struct stat])
135 AC_CHECK_FUNCS([stat _stati64])
136 AC_CHECK_FUNCS([fstat _fstati64])
138 dnl Check for functions that might not be declared in the headers for
139 dnl various idiotic reasons (mostly because of library authors
140 dnl abusing the meaning of __STRICT_ANSI__)
141 AC_CHECK_DECLS(strcasecmp)
142 AC_CHECK_DECLS(stricmp)
143 AC_CHECK_DECLS(strncasecmp)
144 AC_CHECK_DECLS(strnicmp)
145 AC_CHECK_DECLS(strsep)
146 AC_CHECK_DECLS(strlcpy)
147 AC_CHECK_DECLS(strnlen)
149 dnl Check for missing types
152 dnl Documentation: should we generate an uncompressed PDF? It is
153 dnl about twice as big, but it can be externally compressed (e.g. with xz)
154 dnl and becomes significantly smaller than the original.
155 PA_ARG_DISABLED([pdf-compression],
156 [generate an uncompressed documentation PDF],
157 [PDFOPT='-nocompress'])
161 dnl Check for supported gcc attributes; some compilers (e.g. Sun CC)
162 dnl support these, but don't define __GNUC__ as they don't support
163 dnl some other features of gcc.
165 PA_ADD_CFLAGS([-Werror=attributes])
166 PA_FUNC_ATTRIBUTE(noreturn)
167 PA_FUNC_ATTRIBUTE(returns_nonnull)
168 PA_FUNC_ATTRIBUTE(malloc)
169 PA_FUNC_ATTRIBUTE(alloc_size, (1))
170 PA_FUNC_ATTRIBUTE(format, [(printf,1,2)], int, [const char *, ...], ["%d",1])
171 PA_FUNC_ATTRIBUTE(const)
172 PA_FUNC_ATTRIBUTE(pure)
173 PA_FUNC_ATTRIBUTE_ERROR
176 dnl support function sections
178 PA_ARG_ENABLED([sections],
179 [compile with function/data section support],
180 [PA_ADD_CFLAGS([-ffunction-sections]),
181 PA_ADD_CFLAGS([-fdata-sections])],
186 PA_ARG_ENABLED([lto],
187 [compile with gcc-style link time optimization],
188 [PA_ADD_CLDFLAGS([-flto])
189 dnl Note: we use _PROG rather than _TOOL since we are prepending the full
190 dnl CC name which ought to already contain the host triplet if needed
191 ccbase=`echo "$CC" | awk '{ print $1; }'`
192 AC_CHECK_PROGS(CC_AR, [${ccbase}-ar], [$ac_cv_prog_AR])
194 AC_CHECK_PROGS(CC_RANLIB, [${ccbase}-ranlib], [$ac_cv_prog_RANLIB])
195 RANLIB="$CC_RANLIB"], [])
197 dnl If we have gcc, add appropriate code cleanliness options
199 PA_ADD_CFLAGS([-Wall])
200 PA_ADD_CFLAGS([-pedantic])
201 dnl LLVM doesn't error out on invalid -W options unless this option is
202 dnl specified first. Enable this so this script can actually discover
203 dnl which -W options are possible for this compiler.
204 PA_ADD_CFLAGS([-Werror=unknown-warning-option])
205 dnl Suppress format warning on Windows targets due to their <inttypes.h>
206 PA_ADD_CFLAGS([-Wpedantic-ms-format],[-Wno-pedantic-ms-format])
207 PA_ADD_CFLAGS([-Wc90-c99-compat])
208 PA_ADD_CFLAGS([-Wlong-long],[-Wno-long-long])
209 dnl PA_ADD_CFLAGS([-Wwrite-strings])
210 PA_ARG_ENABLED([werror],
211 [compile with -Werror to error out on any warning],
212 [PA_ADD_CFLAGS([-Werror])],
213 [PA_ADD_CFLAGS([-Werror=implicit])
214 PA_ADD_CFLAGS([-Werror=missing-braces])
215 PA_ADD_CFLAGS([-Werror=return-type])
216 PA_ADD_CFLAGS([-Werror=trigraphs])
217 PA_ADD_CFLAGS([-Werror=pointer-arith])
218 PA_ADD_CFLAGS([-Werror=strict-prototypes])
219 PA_ADD_CFLAGS([-Werror=missing-prototypes])
220 PA_ADD_CFLAGS([-Werror=missing-declarations])
221 PA_ADD_CFLAGS([-Werror=comment])
222 PA_ADD_CFLAGS([-Werror=vla])]
228 PA_ARG_ENABLED([ccache], [compile with ccache], [CC="ccache $CC"], [])
230 AC_OUTPUT_COMMANDS([mkdir -p config nasmlib nsis output stdlib x86 asm disasm rdoff])
231 AC_OUTPUT(Makefile doc/Makefile)