code/trunk/configure.ac

dnl Process this file with autoconf to produce a configure script.

dnl This configure.in file has been hacked around quite a lot as a result of
dnl patches that various people have sent to me (PH). Sometimes the information
dnl I get is contradictory. I've tried to put in comments that explain things,
dnl but in some cases the information is second-hand and I have no way of
dnl verifying it. I am not an autoconf or libtool expert!

dnl This is required at the start; the name is the name of a file
dnl it should be seeing, to verify it is in the same directory.

AC_INIT(dftables.c)

dnl A safety precaution

AC_PREREQ(2.57)

dnl Arrange to build config.h from config.h.in.
dnl Manual says this macro should come right after AC_INIT.
AC_CONFIG_HEADER(config.h)

dnl Default values for miscellaneous macros

POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=10

dnl Provide versioning information for libtool shared libraries that
dnl are built by default on Unix systems.

PCRE_LIB_VERSION=0:1:0
PCRE_POSIXLIB_VERSION=0:0:0
PCRE_CPPLIB_VERSION=0:0:0

dnl Find the PCRE version from the pcre.h file. The PCRE_VERSION variable is
dnl substituted in pcre-config.in.

PCRE_MAJOR=`grep '#define PCRE_MAJOR' ./pcre.h | cut -c 29-`
PCRE_MINOR=`grep '#define PCRE_MINOR' ./pcre.h | cut -c 29-`
PCRE_PRERELEASE=`grep '#define PCRE_PRERELEASE' ./pcre.h | cut -c 29-`
PCRE_VERSION=${PCRE_MAJOR}.${PCRE_MINOR}${PCRE_PRERELEASE}

dnl Handle --disable-cpp

AC_ARG_ENABLE(cpp,
[  --disable-cpp           disable C++ support],
want_cpp="$enableval", want_cpp=yes)

dnl Checks for programs.

AC_PROG_CC

dnl Test for C++ for the C++ wrapper libpcrecpp. It seems, however, that
dnl AC_PROC_CXX will set $CXX to "g++" when no C++ compiler is installed, even
dnl though that is completely bogus. (This may happen only on certain systems
dnl with certain versions of autoconf, of course.) An attempt to include this
dnl test inside a check for want_cpp was criticized by a libtool expert, who
dnl tells me that it isn't allowed.

AC_PROG_CXX

dnl The icc compiler has the same options as gcc, so let the rest of the
dnl configure script think it has gcc when setting up dnl options etc.
dnl This is a nasty hack which no longer seems necessary with the update
dnl to the latest libtool files, so I have commented it out.
dnl
dnl if test "$CC" = "icc" ; then GCC=yes ; fi

AC_PROG_INSTALL
AC_LIBTOOL_WIN32_DLL
AC_PROG_LIBTOOL

dnl We need to find a compiler for compiling a program to run on the local host
dnl while building. It needs to be different from CC when cross-compiling.
dnl There is a macro called AC_PROG_CC_FOR_BUILD in the GNU archive for
dnl figuring this out automatically. Unfortunately, it does not work with the
dnl latest versions of autoconf. So for the moment, we just default to the
dnl same values as the "main" compiler. People who are cross-compiling will
dnl just have to adjust the Makefile by hand or set these values when they
dnl run "configure".

CC_FOR_BUILD=${CC_FOR_BUILD:-'$(CC)'}
CXX_FOR_BUILD=${CXX_FOR_BUILD:-'$(CXX)'}
CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD:-'$(CFLAGS)'}
CPPFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD:-'$(CPPFLAGS)'}
CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD:-'$(CXXFLAGS)'}
BUILD_EXEEXT=${BUILD_EXEEXT:-'$(EXEEXT)'}
BUILD_OBJEXT=${BUILD_OBJEXT:-'$(OBJEXT)'}

dnl Checks for header files.

AC_HEADER_STDC
AC_CHECK_HEADERS(limits.h)

dnl The files below are C++ header files. One person told me (PH) that
dnl AC_LANG_CPLUSPLUS unsets CXX if it was explicitly set to something which
dnl doesn't work. However, this doesn't always seem to be the case.

if test "x$want_cpp" = "xyes" -a -n "$CXX"
then
AC_LANG_SAVE
AC_LANG_CPLUSPLUS

dnl We could be more clever here, given we're doing AC_SUBST with this
dnl (eg set a var to be the name of the include file we want).  But we're not
dnl so it's easy to change back to 'regular' autoconf vars if we needed to.
AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],
                         [pcre_have_cpp_headers="0"])
AC_CHECK_HEADERS(bits/type_traits.h, [pcre_have_bits_type_traits="1"],
                                     [pcre_have_bits_type_traits="0"])
AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],
                                [pcre_have_type_traits="0"])
dnl Using AC_SUBST eliminates the need to include config.h in a public .h file
AC_SUBST(pcre_have_bits_type_traits)
AC_SUBST(pcre_have_type_traits)
AC_LANG_RESTORE
fi

dnl From the above, we now have enough info to know if C++ is fully installed
if test "x$want_cpp" = "xyes" -a -n "$CXX" -a "$pcre_have_cpp_headers" = 1; then
  MAYBE_CPP_TARGETS='$(CPP_TARGETS)'
  HAVE_CPP=
else
  MAYBE_CPP_TARGETS=
  HAVE_CPP="#"
fi
AC_SUBST(MAYBE_CPP_TARGETS)
AC_SUBST(HAVE_CPP)

dnl Checks for typedefs, structures, and compiler characteristics.

AC_C_CONST
AC_TYPE_SIZE_T

AC_CHECK_TYPES([long long], [pcre_have_long_long="1"], [pcre_have_long_long="0"])
AC_CHECK_TYPES([unsigned long long], [pcre_have_ulong_long="1"], [pcre_have_ulong_long="0"])
AC_SUBST(pcre_have_long_long)
AC_SUBST(pcre_have_ulong_long)

dnl Checks for library functions.

AC_CHECK_FUNCS(bcopy memmove strerror strtoq strtoll)

dnl Handle --enable-utf8

AC_ARG_ENABLE(utf8,
[  --enable-utf8           enable UTF8 support],
if test "$enableval" = "yes"; then
  UTF8=-DSUPPORT_UTF8
fi
)

dnl Handle --enable-unicode-properties

AC_ARG_ENABLE(unicode-properties,
[  --enable-unicode-properties  enable Unicode properties support],
if test "$enableval" = "yes"; then
  UCP=-DSUPPORT_UCP
fi
)

dnl Handle --enable-newline-is-cr

AC_ARG_ENABLE(newline-is-cr,
[  --enable-newline-is-cr  use CR as the newline character],
if test "$enableval" = "yes"; then
  NEWLINE=-DNEWLINE=13
fi
)

dnl Handle --enable-newline-is-lf

AC_ARG_ENABLE(newline-is-lf,
[  --enable-newline-is-lf  use LF as the newline character],
if test "$enableval" = "yes"; then
  NEWLINE=-DNEWLINE=10
fi
)

dnl Handle --enable-ebcdic

AC_ARG_ENABLE(ebcdic,
[  --enable-ebcdic         assume EBCDIC coding rather than ASCII],
if test "$enableval" == "yes"; then
  EBCDIC=-DEBCDIC=1
fi
)

dnl Handle --disable-stack-for-recursion

AC_ARG_ENABLE(stack-for-recursion,
[  --disable-stack-for-recursion  disable use of stack recursion when matching],
if test "$enableval" = "no"; then
  NO_RECURSE=-DNO_RECURSE
fi
)

dnl There doesn't seem to be a straightforward way of having parameters
dnl that set values, other than fudging the --with thing. So that's what
dnl I've done.

dnl Handle --with-posix-malloc-threshold=n

AC_ARG_WITH(posix-malloc-threshold,
[  --with-posix-malloc-threshold=10  threshold for POSIX malloc usage],
  POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=$withval
)

dnl Handle --with-link-size=n

AC_ARG_WITH(link-size,
[  --with-link-size=2    internal link size (2, 3, or 4 allowed)],
  LINK_SIZE=-DLINK_SIZE=$withval
)

dnl Handle --with-match-limit=n

AC_ARG_WITH(match-limit,
[  --with-match-limit=10000000  default limit on internal looping],
  MATCH_LIMIT=-DMATCH_LIMIT=$withval
)

dnl Handle --with-match-limit_recursion=n

AC_ARG_WITH(match-limit-recursion,
[  --with-match-limit-recursion=10000000  default limit on internal recursion],
  MATCH_LIMIT_RECURSION=-DMATCH_LIMIT_RECURSION=$withval
)

dnl Unicode character property support implies UTF-8 support

if test "$UCP" != "" ; then
  UTF8=-DSUPPORT_UTF8
fi

dnl "Export" these variables

AC_SUBST(BUILD_EXEEXT)
AC_SUBST(BUILD_OBJEXT)
AC_SUBST(CC_FOR_BUILD)
AC_SUBST(CXX_FOR_BUILD)
AC_SUBST(CFLAGS_FOR_BUILD)
AC_SUBST(CXXFLAGS_FOR_BUILD)
AC_SUBST(CXXLDFLAGS)
AC_SUBST(EBCDIC)
AC_SUBST(HAVE_MEMMOVE)
AC_SUBST(HAVE_STRERROR)
AC_SUBST(LINK_SIZE)
AC_SUBST(MATCH_LIMIT)
AC_SUBST(MATCH_LIMIT_RECURSION)
AC_SUBST(NEWLINE)
AC_SUBST(NO_RECURSE)
AC_SUBST(PCRE_LIB_VERSION)
AC_SUBST(PCRE_POSIXLIB_VERSION)
AC_SUBST(PCRE_CPPLIB_VERSION)
AC_SUBST(PCRE_VERSION)
AC_SUBST(POSIX_MALLOC_THRESHOLD)
AC_SUBST(UCP)
AC_SUBST(UTF8)

dnl Stuff to make MinGW work better. Special treatment is no longer
dnl needed for Cygwin.

case $host_os in
mingw* )
    POSIX_OBJ=pcreposix.o
    POSIX_LOBJ=pcreposix.lo
    POSIX_LIB=
    ON_WINDOWS=
    NOT_ON_WINDOWS="#"
    WIN_PREFIX=
    ;;
* )
    ON_WINDOWS="#"
    NOT_ON_WINDOWS=
    POSIX_OBJ=
    POSIX_LOBJ=
    POSIX_LIB=libpcreposix.la
    WIN_PREFIX=
    ;;
esac
AC_SUBST(WIN_PREFIX)
AC_SUBST(ON_WINDOWS)
AC_SUBST(NOT_ON_WINDOWS)
AC_SUBST(POSIX_OBJ)
AC_SUBST(POSIX_LOBJ)
AC_SUBST(POSIX_LIB)

if test "x$enable_shared" = "xno" ; then
    AC_DEFINE([PCRE_STATIC],[1],[to link statically])
fi

dnl This must be last; it determines what files are written as well as config.h
AC_OUTPUT(Makefile pcre-config:pcre-config.in libpcre.pc:libpcre.pc.in pcrecpparg.h:pcrecpparg.h.in pcre_stringpiece.h:pcre_stringpiece.h.in RunGrepTest:RunGrepTest.in RunTest:RunTest.in,[chmod a+x RunTest RunGrepTest pcre-config])
1	dnl Process this file with autoconf to produce a configure script.
2
3	dnl This configure.in file has been hacked around quite a lot as a result of
4	dnl patches that various people have sent to me (PH). Sometimes the information
5	dnl I get is contradictory. I've tried to put in comments that explain things,
6	dnl but in some cases the information is second-hand and I have no way of
7	dnl verifying it. I am not an autoconf or libtool expert!
8
9	dnl This is required at the start; the name is the name of a file
10	dnl it should be seeing, to verify it is in the same directory.
11
12	AC_INIT(dftables.c)
13
14	dnl A safety precaution
15
16	AC_PREREQ(2.57)
17
18	dnl Arrange to build config.h from config.h.in.
19	dnl Manual says this macro should come right after AC_INIT.
20	AC_CONFIG_HEADER(config.h)
21
22	dnl Default values for miscellaneous macros
23
24	POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=10
25
26	dnl Provide versioning information for libtool shared libraries that
27	dnl are built by default on Unix systems.
28
29	PCRE_LIB_VERSION=0:1:0
30	PCRE_POSIXLIB_VERSION=0:0:0
31	PCRE_CPPLIB_VERSION=0:0:0
32
33	dnl Find the PCRE version from the pcre.h file. The PCRE_VERSION variable is
34	dnl substituted in pcre-config.in.
35
36	PCRE_MAJOR=`grep '#define PCRE_MAJOR' ./pcre.h \| cut -c 29-`
37	PCRE_MINOR=`grep '#define PCRE_MINOR' ./pcre.h \| cut -c 29-`
38	PCRE_PRERELEASE=`grep '#define PCRE_PRERELEASE' ./pcre.h \| cut -c 29-`
39	PCRE_VERSION=${PCRE_MAJOR}.${PCRE_MINOR}${PCRE_PRERELEASE}
40
41	dnl Handle --disable-cpp
42
43	AC_ARG_ENABLE(cpp,
44	[ --disable-cpp disable C++ support],
45	want_cpp="$enableval", want_cpp=yes)
46
47	dnl Checks for programs.
48
49	AC_PROG_CC
50
51	dnl Test for C++ for the C++ wrapper libpcrecpp. It seems, however, that
52	dnl AC_PROC_CXX will set $CXX to "g++" when no C++ compiler is installed, even
53	dnl though that is completely bogus. (This may happen only on certain systems
54	dnl with certain versions of autoconf, of course.) An attempt to include this
55	dnl test inside a check for want_cpp was criticized by a libtool expert, who
56	dnl tells me that it isn't allowed.
57
58	AC_PROG_CXX
59
60	dnl The icc compiler has the same options as gcc, so let the rest of the
61	dnl configure script think it has gcc when setting up dnl options etc.
62	dnl This is a nasty hack which no longer seems necessary with the update
63	dnl to the latest libtool files, so I have commented it out.
64	dnl
65	dnl if test "$CC" = "icc" ; then GCC=yes ; fi
66
67	AC_PROG_INSTALL
68	AC_LIBTOOL_WIN32_DLL
69	AC_PROG_LIBTOOL
70
71	dnl We need to find a compiler for compiling a program to run on the local host
72	dnl while building. It needs to be different from CC when cross-compiling.
73	dnl There is a macro called AC_PROG_CC_FOR_BUILD in the GNU archive for
74	dnl figuring this out automatically. Unfortunately, it does not work with the
75	dnl latest versions of autoconf. So for the moment, we just default to the
76	dnl same values as the "main" compiler. People who are cross-compiling will
77	dnl just have to adjust the Makefile by hand or set these values when they
78	dnl run "configure".
79
80	CC_FOR_BUILD=${CC_FOR_BUILD:-'$(CC)'}
81	CXX_FOR_BUILD=${CXX_FOR_BUILD:-'$(CXX)'}
82	CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD:-'$(CFLAGS)'}
83	CPPFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD:-'$(CPPFLAGS)'}
84	CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD:-'$(CXXFLAGS)'}
85	BUILD_EXEEXT=${BUILD_EXEEXT:-'$(EXEEXT)'}
86	BUILD_OBJEXT=${BUILD_OBJEXT:-'$(OBJEXT)'}
87
88	dnl Checks for header files.
89
90	AC_HEADER_STDC
91	AC_CHECK_HEADERS(limits.h)
92
93	dnl The files below are C++ header files. One person told me (PH) that
94	dnl AC_LANG_CPLUSPLUS unsets CXX if it was explicitly set to something which
95	dnl doesn't work. However, this doesn't always seem to be the case.
96
97	if test "x$want_cpp" = "xyes" -a -n "$CXX"
98	then
99	AC_LANG_SAVE
100	AC_LANG_CPLUSPLUS
101
102	dnl We could be more clever here, given we're doing AC_SUBST with this
103	dnl (eg set a var to be the name of the include file we want). But we're not
104	dnl so it's easy to change back to 'regular' autoconf vars if we needed to.
105	AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],
106	[pcre_have_cpp_headers="0"])
107	AC_CHECK_HEADERS(bits/type_traits.h, [pcre_have_bits_type_traits="1"],
108	[pcre_have_bits_type_traits="0"])
109	AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],
110	[pcre_have_type_traits="0"])
111	dnl Using AC_SUBST eliminates the need to include config.h in a public .h file
112	AC_SUBST(pcre_have_bits_type_traits)
113	AC_SUBST(pcre_have_type_traits)
114	AC_LANG_RESTORE
115	fi
116
117	dnl From the above, we now have enough info to know if C++ is fully installed
118	if test "x$want_cpp" = "xyes" -a -n "$CXX" -a "$pcre_have_cpp_headers" = 1; then
119	MAYBE_CPP_TARGETS='$(CPP_TARGETS)'
120	HAVE_CPP=
121	else
122	MAYBE_CPP_TARGETS=
123	HAVE_CPP="#"
124	fi
125	AC_SUBST(MAYBE_CPP_TARGETS)
126	AC_SUBST(HAVE_CPP)
127
128	dnl Checks for typedefs, structures, and compiler characteristics.
129
130	AC_C_CONST
131	AC_TYPE_SIZE_T
132
133	AC_CHECK_TYPES([long long], [pcre_have_long_long="1"], [pcre_have_long_long="0"])
134	AC_CHECK_TYPES([unsigned long long], [pcre_have_ulong_long="1"], [pcre_have_ulong_long="0"])
135	AC_SUBST(pcre_have_long_long)
136	AC_SUBST(pcre_have_ulong_long)
137
138	dnl Checks for library functions.
139
140	AC_CHECK_FUNCS(bcopy memmove strerror strtoq strtoll)
141
142	dnl Handle --enable-utf8
143
144	AC_ARG_ENABLE(utf8,
145	[ --enable-utf8 enable UTF8 support],
146	if test "$enableval" = "yes"; then
147	UTF8=-DSUPPORT_UTF8
148	fi
149	)
150
151	dnl Handle --enable-unicode-properties
152
153	AC_ARG_ENABLE(unicode-properties,
154	[ --enable-unicode-properties enable Unicode properties support],
155	if test "$enableval" = "yes"; then
156	UCP=-DSUPPORT_UCP
157	fi
158	)
159
160	dnl Handle --enable-newline-is-cr
161
162	AC_ARG_ENABLE(newline-is-cr,
163	[ --enable-newline-is-cr use CR as the newline character],
164	if test "$enableval" = "yes"; then
165	NEWLINE=-DNEWLINE=13
166	fi
167	)
168
169	dnl Handle --enable-newline-is-lf
170
171	AC_ARG_ENABLE(newline-is-lf,
172	[ --enable-newline-is-lf use LF as the newline character],
173	if test "$enableval" = "yes"; then
174	NEWLINE=-DNEWLINE=10
175	fi
176	)
177
178	dnl Handle --enable-ebcdic
179
180	AC_ARG_ENABLE(ebcdic,
181	[ --enable-ebcdic assume EBCDIC coding rather than ASCII],
182	if test "$enableval" == "yes"; then
183	EBCDIC=-DEBCDIC=1
184	fi
185	)
186
187	dnl Handle --disable-stack-for-recursion
188
189	AC_ARG_ENABLE(stack-for-recursion,
190	[ --disable-stack-for-recursion disable use of stack recursion when matching],
191	if test "$enableval" = "no"; then
192	NO_RECURSE=-DNO_RECURSE
193	fi
194	)
195
196	dnl There doesn't seem to be a straightforward way of having parameters
197	dnl that set values, other than fudging the --with thing. So that's what
198	dnl I've done.
199
200	dnl Handle --with-posix-malloc-threshold=n
201
202	AC_ARG_WITH(posix-malloc-threshold,
203	[ --with-posix-malloc-threshold=10 threshold for POSIX malloc usage],
204	POSIX_MALLOC_THRESHOLD=-DPOSIX_MALLOC_THRESHOLD=$withval
205	)
206
207	dnl Handle --with-link-size=n
208
209	AC_ARG_WITH(link-size,
210	[ --with-link-size=2 internal link size (2, 3, or 4 allowed)],
211	LINK_SIZE=-DLINK_SIZE=$withval
212	)
213
214	dnl Handle --with-match-limit=n
215
216	AC_ARG_WITH(match-limit,
217	[ --with-match-limit=10000000 default limit on internal looping],
218	MATCH_LIMIT=-DMATCH_LIMIT=$withval
219	)
220
221	dnl Handle --with-match-limit_recursion=n
222
223	AC_ARG_WITH(match-limit-recursion,
224	[ --with-match-limit-recursion=10000000 default limit on internal recursion],
225	MATCH_LIMIT_RECURSION=-DMATCH_LIMIT_RECURSION=$withval
226	)
227
228	dnl Unicode character property support implies UTF-8 support
229
230	if test "$UCP" != "" ; then
231	UTF8=-DSUPPORT_UTF8
232	fi
233
234	dnl "Export" these variables
235
236	AC_SUBST(BUILD_EXEEXT)
237	AC_SUBST(BUILD_OBJEXT)
238	AC_SUBST(CC_FOR_BUILD)
239	AC_SUBST(CXX_FOR_BUILD)
240	AC_SUBST(CFLAGS_FOR_BUILD)
241	AC_SUBST(CXXFLAGS_FOR_BUILD)
242	AC_SUBST(CXXLDFLAGS)
243	AC_SUBST(EBCDIC)
244	AC_SUBST(HAVE_MEMMOVE)
245	AC_SUBST(HAVE_STRERROR)
246	AC_SUBST(LINK_SIZE)
247	AC_SUBST(MATCH_LIMIT)
248	AC_SUBST(MATCH_LIMIT_RECURSION)
249	AC_SUBST(NEWLINE)
250	AC_SUBST(NO_RECURSE)
251	AC_SUBST(PCRE_LIB_VERSION)
252	AC_SUBST(PCRE_POSIXLIB_VERSION)
253	AC_SUBST(PCRE_CPPLIB_VERSION)
254	AC_SUBST(PCRE_VERSION)
255	AC_SUBST(POSIX_MALLOC_THRESHOLD)
256	AC_SUBST(UCP)
257	AC_SUBST(UTF8)
258
259	dnl Stuff to make MinGW work better. Special treatment is no longer
260	dnl needed for Cygwin.
261
262	case $host_os in
263	mingw* )
264	POSIX_OBJ=pcreposix.o
265	POSIX_LOBJ=pcreposix.lo
266	POSIX_LIB=
267	ON_WINDOWS=
268	NOT_ON_WINDOWS="#"
269	WIN_PREFIX=
270	;;
271	* )
272	ON_WINDOWS="#"
273	NOT_ON_WINDOWS=
274	POSIX_OBJ=
275	POSIX_LOBJ=
276	POSIX_LIB=libpcreposix.la
277	WIN_PREFIX=
278	;;
279	esac
280	AC_SUBST(WIN_PREFIX)
281	AC_SUBST(ON_WINDOWS)
282	AC_SUBST(NOT_ON_WINDOWS)
283	AC_SUBST(POSIX_OBJ)
284	AC_SUBST(POSIX_LOBJ)
285	AC_SUBST(POSIX_LIB)
286
287	if test "x$enable_shared" = "xno" ; then
288	AC_DEFINE([PCRE_STATIC],[1],[to link statically])
289	fi
290
291	dnl This must be last; it determines what files are written as well as config.h
292	AC_OUTPUT(Makefile pcre-config:pcre-config.in libpcre.pc:libpcre.pc.in pcrecpparg.h:pcrecpparg.h.in pcre_stringpiece.h:pcre_stringpiece.h.in RunGrepTest:RunGrepTest.in RunTest:RunTest.in,[chmod a+x RunTest RunGrepTest pcre-config])