build: Only check for required headers

CMakeLists.txt

@@ -136,22 +136,20 @@ check_c_source_compiles("
     f(void) {}
     int main(void) { return 0; }
 " HAVE_FUNC_ATTRIBUTE_DESTRUCTOR)
-check_include_files(arpa/inet.h HAVE_ARPA_INET_H)
-check_function_exists(class HAVE_CLASS)
-check_include_files(dlfcn.h HAVE_DLFCN_H)
-check_library_exists(dl dlopen "" HAVE_DLOPEN)
-check_include_files(dl.h HAVE_DL_H)
 check_symbol_exists(getentropy "sys/random.h" HAVE_DECL_GETENTROPY)
 check_library_exists(history append_history "" HAVE_LIBHISTORY)
 check_library_exists(readline readline "" HAVE_LIBREADLINE)
 check_symbol_exists(mmap "sys/mman.h" HAVE_DECL_MMAP)
-check_include_files(netdb.h HAVE_NETDB_H)
-check_include_files(netinet/in.h HAVE_NETINET_IN_H)
-check_include_files(poll.h HAVE_POLL_H)
-check_library_exists(dld shl_load "" HAVE_SHLLOAD)
 check_include_files(stdint.h HAVE_STDINT_H)
-check_include_files(sys/select.h HAVE_SYS_SELECT_H)
-check_include_files(sys/socket.h HAVE_SYS_SOCKET_H)
+
+if(LIBXML2_WITH_HTTP)
+    check_include_files(arpa/inet.h HAVE_ARPA_INET_H)
+    check_include_files(netdb.h HAVE_NETDB_H)
+    check_include_files(netinet/in.h HAVE_NETINET_IN_H)
+    check_include_files(poll.h HAVE_POLL_H)
+    check_include_files(sys/select.h HAVE_SYS_SELECT_H)
+    check_include_files(sys/socket.h HAVE_SYS_SOCKET_H)
+endif()
 
 if(LIBXML2_WITH_TLS)
     check_c_source_compiles(
@@ -306,6 +304,11 @@ target_include_directories(
 )
 
 if(LIBXML2_WITH_MODULES)
+    check_include_files(dlfcn.h HAVE_DLFCN_H)
+    check_library_exists(dl dlopen "" HAVE_DLOPEN)
+    check_include_files(dl.h HAVE_DL_H)
+    check_library_exists(dld shl_load "" HAVE_SHLLOAD)
+
     if(HAVE_DLOPEN)
         target_link_libraries(LibXml2 PRIVATE dl)
         set(MODULE_LIBS "-ldl")

configure.ac

@@ -298,7 +298,6 @@ dnl
 dnl Checks for header files.
 dnl
 AC_CHECK_HEADERS([stdint.h])
-AC_CHECK_HEADERS([dl.h dlfcn.h])
 AC_CHECK_HEADERS([glob.h])
 AM_CONDITIONAL(WITH_GLOB, test "$ac_cv_header_glob_h" = "yes")
 
@@ -662,6 +661,8 @@ if test "$with_modules" != "no" ; then
     esac
 
     if test "$WITH_MODULES" = "0"; then
+        AC_CHECK_HEADERS([dl.h dlfcn.h])
+
         _libs=$LIBS
         AC_SEARCH_LIBS([dlopen], [dl], [
             WITH_MODULES=1

meson.build

@@ -233,23 +233,23 @@ config_h.set_quoted('LOCALEDIR', dir_locale)
 
 # header files
 xml_check_headers = [
-    'stdint.h',
-    'dl.h',
-    'dlfcn.h',
-    'glob.h',
+    [ 'stdint.h', true ],
+    [ 'glob.h', true ],
 
-    # http
-    'sys/socket.h',
-    'netinet/in.h',
-    'arpa/inet.h',
-    'netdb.h',
-    'sys/select.h',
-    'poll.h',
+    [ 'dl.h', want_modules ],
+    [ 'dlfcn.h', want_modules ],
+
+    [ 'sys/socket.h', want_http ],
+    [ 'netinet/in.h', want_http ],
+    [ 'arpa/inet.h', want_http ],
+    [ 'netdb.h', want_http ],
+    [ 'sys/select.h', want_http ],
+    [ 'poll.h', want_http ],
 ]
 
 foreach header : xml_check_headers
-    if cc.has_header(header)
-        config_h.set10('HAVE_' + header.underscorify().to_upper(), true)
+    if header[1] and cc.has_header(header[0])
+        config_h.set10('HAVE_' + header[0].underscorify().to_upper(), true)
     endif
 endforeach