/[pcre]/code/trunk/configure.in
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revision 82 by nigel, Sat Feb 24 21:40:59 2007 UTC revision 83 by nigel, Sat Feb 24 21:41:06 2007 UTC
# Line 1  Line 1 
1  dnl Process this file with autoconf to produce a configure script.  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  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.  dnl it should be seeing, to verify it is in the same directory.
11    
# Line 21  dnl digits for minor numbers less than 1 Line 27  dnl digits for minor numbers less than 1
27  dnl that many releases anyway.  dnl that many releases anyway.
28    
29  PCRE_MAJOR=6  PCRE_MAJOR=6
30  PCRE_MINOR=2  PCRE_MINOR=3
31  PCRE_DATE=01-Aug-2005  PCRE_DATE=15-Aug-2005
32  PCRE_VERSION=${PCRE_MAJOR}.${PCRE_MINOR}  PCRE_VERSION=${PCRE_MAJOR}.${PCRE_MINOR}
33    
34  dnl Default values for miscellaneous macros  dnl Default values for miscellaneous macros
# Line 36  PCRE_LIB_VERSION=0:1:0 Line 42  PCRE_LIB_VERSION=0:1:0
42  PCRE_POSIXLIB_VERSION=0:0:0  PCRE_POSIXLIB_VERSION=0:0:0
43  PCRE_CPPLIB_VERSION=0:0:0  PCRE_CPPLIB_VERSION=0:0:0
44    
45    dnl Handle --disable-cpp
46    
47    AC_ARG_ENABLE(cpp,
48    [  --disable-cpp           disable C++ support],
49    want_cpp="$enableval", want_cpp=yes)
50    
51  dnl Checks for programs.  dnl Checks for programs.
52    
53  AC_PROG_CC  AC_PROG_CC
54    
55  dnl For the C++ wrapper libpcrecpp.  dnl Test for C++ for the C++ wrapper libpcrecpp. It seems, however, that
56    dnl AC_PROC_CXX will set $CXX to "g++" when no C++ compiler is installed, even
57    dnl though that is completely bogus. (This may happen only on certain systems
58    dnl with certain versions of autoconf, of course.) An attempt to include this
59    dnl test inside a check for want_cpp was criticized by a libtool expert, who
60    dnl tells me that it isn't allowed.
61    
62  AC_PROG_CXX  AC_PROG_CXX
63    
# Line 60  dnl while building. It needs to be diffe Line 77  dnl while building. It needs to be diffe
77  dnl There is a macro called AC_PROG_CC_FOR_BUILD in the GNU archive for  dnl There is a macro called AC_PROG_CC_FOR_BUILD in the GNU archive for
78  dnl figuring this out automatically. Unfortunately, it does not work with the  dnl figuring this out automatically. Unfortunately, it does not work with the
79  dnl latest versions of autoconf. So for the moment, we just default to the  dnl latest versions of autoconf. So for the moment, we just default to the
80  dnl same values as the "main" compiler. People who are corss-compiling will  dnl same values as the "main" compiler. People who are cross-compiling will
81  dnl just have to adjust the Makefile by hand or set these values when they  dnl just have to adjust the Makefile by hand or set these values when they
82  dnl run "configure".  dnl run "configure".
83    
# Line 77  dnl Checks for header files. Line 94  dnl Checks for header files.
94  AC_HEADER_STDC  AC_HEADER_STDC
95  AC_CHECK_HEADERS(limits.h)  AC_CHECK_HEADERS(limits.h)
96    
97  dnl These are C++ header files  dnl The files below are C++ header files. One person told me (PH) that
98    dnl AC_LANG_CPLUSPLUS unsets CXX if it was explicitly set to something which
99    dnl doesn't work. However, this doesn't always seem to be the case.
100    
101    if test "x$want_cpp" = "xyes" -a -n "$CXX"
102    then
103  AC_LANG_SAVE  AC_LANG_SAVE
104  AC_LANG_CPLUSPLUS  AC_LANG_CPLUSPLUS
105  dnl I could be more clever here, given I'm doing AC_SUBST with this  
106  dnl (eg set a var to be the name of the include file I want).  But I'm not  dnl We could be more clever here, given we're doing AC_SUBST with this
107    dnl (eg set a var to be the name of the include file we want).  But we're not
108  dnl so it's easy to change back to 'regular' autoconf vars if we needed to.  dnl so it's easy to change back to 'regular' autoconf vars if we needed to.
109  AC_CHECK_HEADERS(string, [pcre_has_cpp_headers="1"],  AC_CHECK_HEADERS(string, [pcre_have_cpp_headers="1"],
110                           [pcre_has_cpp_headers="0"])                           [pcre_have_cpp_headers="0"])
111  AC_CHECK_HEADERS(bits/type_traits.h, [pcre_has_bits_type_traits="1"],  AC_CHECK_HEADERS(bits/type_traits.h, [pcre_have_bits_type_traits="1"],
112                                       [pcre_has_bits_type_traits="0"])                                       [pcre_have_bits_type_traits="0"])
113  AC_CHECK_HEADERS(type_traits.h, [pcre_has_type_traits="1"],  AC_CHECK_HEADERS(type_traits.h, [pcre_have_type_traits="1"],
114                                  [pcre_has_type_traits="0"])                                  [pcre_have_type_traits="0"])
115  dnl Using AC_SUBST eliminates the need to include config.h in a public .h file  dnl Using AC_SUBST eliminates the need to include config.h in a public .h file
116  AC_SUBST(pcre_has_bits_type_traits)  AC_SUBST(pcre_have_bits_type_traits)
117  AC_SUBST(pcre_has_type_traits)  AC_SUBST(pcre_have_type_traits)
118  AC_LANG_RESTORE  AC_LANG_RESTORE
119    fi
120    
121  dnl From the above, we now have enough info to know if C++ is fully installed  dnl From the above, we now have enough info to know if C++ is fully installed
122  if test -n "$ac_cv_prog_ac_ct_CXX" -a "$pcre_has_cpp_headers" = 1; then  if test "x$want_cpp" = "xyes" -a -n "$CXX" -a "$pcre_have_cpp_headers" = 1; then
123    MAYBE_CPP_TARGETS='$(CPP_TARGETS)'    MAYBE_CPP_TARGETS='$(CPP_TARGETS)'
124      HAVE_CPP=
125    else
126      MAYBE_CPP_TARGETS=
127      HAVE_CPP="#"
128  fi  fi
129  AC_SUBST(MAYBE_CPP_TARGETS)  AC_SUBST(MAYBE_CPP_TARGETS)
130    AC_SUBST(HAVE_CPP)
131    
132  dnl Checks for typedefs, structures, and compiler characteristics.  dnl Checks for typedefs, structures, and compiler characteristics.
133    
134  AC_C_CONST  AC_C_CONST
135  AC_TYPE_SIZE_T  AC_TYPE_SIZE_T
136    
137  AC_CHECK_TYPES([long long], [pcre_has_long_long="1"], [pcre_has_long_long="0"])  AC_CHECK_TYPES([long long], [pcre_have_long_long="1"], [pcre_have_long_long="0"])
138  AC_CHECK_TYPES([unsigned long long], [pcre_has_ulong_long="1"], [pcre_has_ulong_long="0"])  AC_CHECK_TYPES([unsigned long long], [pcre_have_ulong_long="1"], [pcre_have_ulong_long="0"])
139  AC_SUBST(pcre_has_long_long)  AC_SUBST(pcre_have_long_long)
140  AC_SUBST(pcre_has_ulong_long)  AC_SUBST(pcre_have_ulong_long)
141    
142  dnl Checks for library functions.  dnl Checks for library functions.
143    

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