On Monday 23 July 2007 21:18, Joao Miguel Ferreira wrote:
> AC_CHECK_HEADER(libxml2/libxml/xpath.h libxml/xpath.h
> xpath.h,,AC_MSG_ERROR([cannot find headers for libxml2]))
>
> but ./configure always tells me the same:
>
> ...
> checking xpath.h usability... no
> checking xpath.h presence... no
> checking for xpath.h... no
> configure: error: cannot find headers for libxml2
>
> but I am quite sure the headers are there (I installed them: libxml
> and libxml-dev;); see bellow
>
> $ ls -la /usr/include/libxml2/libxml/ | grep xpath.h
> -rw-r--r-- 1 root root 16042 2006-10-26 22:23 xpath.h
Did you look in config.log, to see *why* the check is failing?
Are you sure that your compiler is searching /usr/include, as the
default include path?
# mkdir -p /usr/include/libxml2/libxml
# touch /usr/include/libxml2/libxml/xpath.h
$ cat > configure.ac
AC_INIT
AC_PROG_CC
AC_CHECK_HEADER([libxml2/libxml/xpath.h],,
[AC_MSG_ERROR([cannot find xml headers])])
$ autoconf
$ ./configure
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ANSI C... none needed
checking how to run the C preprocessor... gcc -E
checking for egrep... grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking libxml2/libxml/xpath.h usability... yes
checking libxml2/libxml/xpath.h presence... yes
checking for libxml2/libxml/xpath.h... yes
HTH,
Keith.
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