Make use of ctpp2 optional.

include/meson.build

@@ -23,8 +23,10 @@ install_headers(
   subdir:'kiwix/common'
 )
 
+if has_ctpp2_dep
+  install_headers(
+    'ctpp2/CTPP2VMStringLoader.hpp',
+    subdir:'kiwix/ctpp2'
+  )
+endif
 
-install_headers(
-  'ctpp2/CTPP2VMStringLoader.hpp',
-  subdir:'kiwix/ctpp2'
-)

include/searcher.h

@@ -31,15 +31,7 @@
 #include "common/pathTools.h"
 #include "common/stringTools.h"
 #include <unicode/putil.h>
-
-#ifndef __ANDROID__
-#include <ctpp2/CDT.hpp>
-#include <ctpp2/CTPP2FileLogger.hpp>
-#include <ctpp2/CTPP2SimpleVM.hpp>
-#include "ctpp2/CTPP2VMStringLoader.hpp"
-
-using namespace CTPP;
-#endif
+#include "kiwix_config.h"
 
 using namespace std;
 
@@ -70,7 +62,7 @@ namespace kiwix {
     void reset();
     void setContentHumanReadableId(const string &contentHumanReadableId);
 
-#ifndef __ANDROID__
+#ifdef ENABLE_CTPP2
     string getHtml();
 #endif
     

kiwix.pc.in

@@ -0,0 +1,10 @@
+prefix=@prefix@
+libdir=${prefix}/lib64
+includedir=${prefix}/include
+
+Name: libkiwix
+Description: A library that contains a lot of things used by used by other kiwix programs
+Version: 1.0
+Requires: @requires@
+Libs: -L${libdir} -lkiwix @extra_libs@
+Cflags: -I${includedir}/ @extra_cflags@

meson.build

@@ -3,74 +3,98 @@ project('kiwixlib', 'cpp',
   license : 'GPL')
 
 compiler = meson.get_compiler('cpp')
+find_library_in_compiler = meson.version().version_compare('>=0.31.0')
 
 thread_dep = dependency('threads')
 libicu_dep = dependency('icu-i18n')
 libzim_dep = dependency('libzim')
 pugixml_dep = dependency('pugixml')
 
-find_library_in_compiler = meson.version().version_compare('>=0.31.0')
+
+has_ctpp2_dep = false
 ctpp2_prefix_install = get_option('ctpp2-install-prefix')
+ctpp2_link_args = []
 if ctpp2_prefix_install == ''
-  if not compiler.has_header('ctpp2/CTPP2Logger.hpp')
-    error('ctpp2/CTPP2Logger.hppnot found')
-  endif
-  if find_library_in_compiler
-    ctpp2_lib = compiler.find_library('ctpp2')
-  else
-    ctpp2_lib = find_library('ctpp2')
-  endif
-  link_args = ['-lctpp2']
-#  if meson.is_cross_build()
-#    if host_machine.system() == 'windows'
-#      link_args += ['-liconv']
+  if compiler.has_header('ctpp2/CTPP2Logger.hpp')
+    if find_library_in_compiler
+      ctpp2_lib = compiler.find_library('ctpp2')
+    else
+      ctpp2_lib = find_library('ctpp2')
+    endif
+#    if meson.is_cross_build()
+#      if host_machine.system() == 'windows'
+#        link_args += ['-liconv']
+#      endif
 #    endif
-#  endif
-  ctpp2_dep = declare_dependency(link_args:link_args)
+    ctpp2_link_args = ['-lctpp2']
+    has_ctpp2_dep = true
+    ctpp2_dep = declare_dependency(link_args:ctpp2_link_args)
+  else
+    message('ctpp2/CTPP2Logger.hpp not found. Compiling without CTPP2 support')
+  endif
 else
   if not find_library_in_compiler
     error('For custom ctpp2_prefix_install you need a meson version >=0.31.0')
   endif
   ctpp2_include_path = ctpp2_prefix_install + '/include'
   ctpp2_include_args = ['-I'+ctpp2_include_path]
-  if not compiler.has_header('ctpp2/CTPP2Logger.hpp', args:ctpp2_include_args)
-    error('ctpp2/CTPP2Logger.hpp not found')
-  endif
-  ctpp2_include_path = include_directories(ctpp2_include_path, is_system:true)
-  ctpp2_lib_path = ctpp2_prefix_install+'/lib'
-  ctpp2_lib = compiler.find_library('ctpp2', dirs:ctpp2_lib_path)
-  link_args = ['-L'+ctpp2_lib_path, '-lctpp2']
-#  if meson.is_cross_build()
-#    if host_machine.system() == 'windows'
-#      link_args += ['-liconv']
+  if compiler.has_header('ctpp2/CTPP2Logger.hpp', args:ctpp2_include_args)
+    ctpp2_include_dir = include_directories(ctpp2_include_path, is_system:true)
+    ctpp2_lib_path = ctpp2_prefix_install+'/lib'
+    ctpp2_lib = compiler.find_library('ctpp2', dirs:ctpp2_lib_path)
+#    if meson.is_cross_build()
+#      if host_machine.system() == 'windows'
+#        link_args += ['-liconv']
+#      endif
 #    endif
-#  endif
-  ctpp2_dep = declare_dependency(include_directories:ctpp2_include_path, link_args:link_args)
+    ctpp2_link_args = ['-L'+ctpp2_lib_path, '-lctpp2']
+    has_ctpp2_dep = true
+    ctpp2_dep = declare_dependency(include_directories:ctpp2_include_dir, link_args:ctpp2_link_args)
+  else
+    message('ctpp2/CTPP2Logger.hpp not found. Compiling without CTPP2 support')
+  endif
 endif
 
-pkg_requires = ['libzim', 'icu-i18n', 'pugixml']
 xapian_dep = dependency('xapian-core', required:false)
-if xapian_dep.found()
-    pkg_requires += ['xapian-core']
-    message('xapian_dep found')
-else
-    message('xapian_dep not found')
-endif
 
-all_deps = [thread_dep, libicu_dep, libzim_dep, ctpp2_dep, xapian_dep, pugixml_dep]
+all_deps = [thread_dep, libicu_dep, libzim_dep, xapian_dep, pugixml_dep]
+if has_ctpp2_dep
+  all_deps += [ctpp2_dep]
+endif
 
 inc = include_directories('include')
 
+conf = configuration_data()
+conf.set('VERSION', '"@0@"'.format(meson.project_version()))
+conf.set('ENABLE_CTPP2', has_ctpp2_dep)
+
 subdir('include')
 subdir('scripts')
 subdir('static')
 subdir('src')
 
-pkg_mod = import('pkgconfig')
-pkg_mod.generate(libraries : kiwixlib,
-                 version : '1.0',
-                 name : 'libkiwix',
-                 filebase : 'kiwix',
-                 description : 'A library that contains a lot of things used by used by other kiwix programs',
-                 requires: pkg_requires)
+pkg_requires = ['libzim', 'icu-i18n', 'pugixml']
+if xapian_dep.found()
+    pkg_requires += ['xapian-core']
+endif
+
+extra_libs = []
+extra_cflags = ''
+if has_ctpp2_dep
+  extra_libs += ctpp2_link_args
+  if ctpp2_include_path != ''
+    extra_cflags = '-I'+ctpp2_include_path
+  endif
+endif
+
+pkg_conf = configuration_data()
+pkg_conf.set('prefix', get_option('prefix'))
+pkg_conf.set('requires', ' '.join(pkg_requires))
+pkg_conf.set('extra_libs', ' '.join(extra_libs))
+pkg_conf.set('extra_cflags', extra_cflags)
+configure_file(output : 'kiwix.pc',
+               configuration : pkg_conf,
+               input : 'kiwix.pc.in',
+               install_dir: get_option('libdir')+'/pkgconfig'
+              )
 

src/config.h.in

@@ -0,0 +1,4 @@
+
+#mesondefine VERSION
+
+#mesondefine ENABLE_CTPP2

src/meson.build

@@ -10,7 +10,6 @@ kiwix_sources = [
   'common/stringTools.cpp',
   'common/networkTools.cpp',
   'common/otherTools.cpp',
-  'ctpp2/CTPP2VMStringLoader.cpp',
   'xapian/htmlparse.cc',
   'xapian/myhtmlparse.cc'
 ]
@@ -20,6 +19,15 @@ if xapian_dep.found()
   kiwix_sources += ['xapianIndexer.cpp', 'xapianSearcher.cpp']
 endif
 
+if has_ctpp2_dep
+  kiwix_sources += ['ctpp2/CTPP2VMStringLoader.cpp']
+endif
+
+config_h = configure_file(output : 'kiwix_config.h',
+               configuration : conf,
+               input : 'config.h.in')
+install_headers(config_h, subdir:'kiwix')
+
 kiwixlib = library('kiwix',
                    kiwix_sources,
                    include_directories : inc,

src/searcher.cpp

@@ -20,6 +20,15 @@
 #include "searcher.h"
 #include "kiwixlib-resources.h"
 
+#ifdef ENABLE_CTPP2
+#include <ctpp2/CDT.hpp>
+#include <ctpp2/CTPP2FileLogger.hpp>
+#include <ctpp2/CTPP2SimpleVM.hpp>
+#include "ctpp2/CTPP2VMStringLoader.hpp"
+
+using namespace CTPP;
+#endif
+
 
 namespace kiwix {
 
@@ -130,7 +139,7 @@ namespace kiwix {
     this->contentHumanReadableId = contentHumanReadableId;
   }
 
-#ifndef __ANDROID__
+#ifdef ENABLE_CTPP2
   
   string Searcher::getHtml() {