Please describe the problem:
Two function definitions and one static variable definition contained within
#ifdef LIBXML_SCHEMAS_ENABLED -- gen_void_ptr_ptr(), des_void_ptr_ptr(), and
gen_nb_void_ptr_ptr -- are needed for segments of code contained within #ifdef
LIBXML_READER_ENABLED and #ifdef LIBXML_MODULES_ENABLED.  When libxml2 is
configured --without-schemas, the definitions are disabled, but the code
attempting to use them is still in place.  It, of course, dies on compile.

Steps to reproduce:
1. gzip -dc libxml2-2.6.19.tar.gz | tar -xf -
2. cd libxml-2.2.6.19
3. ./configure --without-schemas
4. make

Watch it get to testapi.c and die messily.


Actual results:
The compile fails with the following:

if gcc -DHAVE_CONFIG_H -I. -I. -I. -I./include -I./include  -D_REENTRANT     -g
-O2 -pedantic -W -Wformat -Wunused -Wimplicit -Wreturn-type -Wswitch -Wcomment
-Wtrigraphs -Wformat -Wchar-subscripts -Wuninitialized -Wparentheses -Wshadow
-Wpointer-arith -Wcast-align -Wwrite-strings -Waggregate-return
-Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Winline
-Wredundant-decls -MT testapi.o -MD -MP -MF ".deps/testapi.Tpo" -c -o testapi.o
testapi.c; then mv -f ".deps/testapi.Tpo" ".deps/testapi.Po"; else rm -f
".deps/testapi.Tpo"; exit 1; fi
testapi.c: In function `test_xmlModuleSymbol':
testapi.c:28545: error: `gen_nb_void_ptr_ptr' undeclared (first use in this
function)
testapi.c:28545: error: (Each undeclared identifier is reported only once
testapi.c:28545: error: for each function it appears in.)
testapi.c:28549: warning: implicit declaration of function `gen_void_ptr_ptr'
testapi.c:28549: warning: nested extern declaration of `gen_void_ptr_ptr'
testapi.c:28549: warning: assignment makes pointer from integer without a cast
testapi.c:28556: warning: implicit declaration of function `des_void_ptr_ptr'
testapi.c:28556: warning: nested extern declaration of `des_void_ptr_ptr'
testapi.c: In function `test_xmlTextReaderGetErrorHandler':
testapi.c:29865: error: `gen_nb_void_ptr_ptr' undeclared (first use in this
function)
testapi.c:29869: warning: nested extern declaration of `gen_void_ptr_ptr'
testapi.c:28549: warning: redundant redeclaration of 'gen_void_ptr_ptr'
testapi.c:28549: warning: previous implicit declaration of 'gen_void_ptr_ptr'
was here
testapi.c:29869: warning: assignment makes pointer from integer without a cast
testapi.c:29875: warning: nested extern declaration of `des_void_ptr_ptr'
testapi.c:28556: warning: redundant redeclaration of 'des_void_ptr_ptr'
testapi.c:28556: warning: previous implicit declaration of 'des_void_ptr_ptr'
was here
testapi.c: At top level:
testapi.c:301: warning: 'gen_unsigned_long' defined but not used
testapi.c:308: warning: 'des_unsigned_long' defined but not used
testapi.c:327: warning: 'gen_unsigned_long_ptr' defined but not used
testapi.c:332: warning: 'des_unsigned_long_ptr' defined but not used
*** Error code 1
make: Fatal error: Command failed for target `testapi.o'
Current working directory /home/mjbauer/build/libxml2/src
*** Error code 1
make: Fatal error: Command failed for target `all-recursive'
Current working directory /home/mjbauer/build/libxml2/src
*** Error code 1
make: Fatal error: Command failed for target `all'


Expected results:
testapi.c to compile without errors.

Does this happen every time?
Yes.

Other information: