build: Check for declaration of glob() function

Don't rely on presence of glob.h.

CMakeLists.txt

@@ -141,6 +141,7 @@ check_c_source_compiles("
     int main(void) { return 0; }
 " HAVE_FUNC_ATTRIBUTE_DESTRUCTOR)
 check_symbol_exists(getentropy "sys/random.h" HAVE_DECL_GETENTROPY)
+check_symbol_exists(glob "glob.h" HAVE_DECL_GLOB)
 check_symbol_exists(mmap "sys/mman.h" HAVE_DECL_MMAP)
 check_include_files(stdint.h HAVE_STDINT_H)
 

config.h.cmake.in

@@ -2,6 +2,10 @@
    don't. */
 #cmakedefine01 HAVE_DECL_GETENTROPY
 
+/* Define to 1 if you have the declaration of 'glob', and to 0 if you don't.
+   */
+#cmakedefine01 HAVE_DECL_GLOB
+
 /* Define to 1 if you have the declaration of 'mmap', and to 0 if you don't.
    */
 #cmakedefine01 HAVE_DECL_MMAP

configure.ac

@@ -298,12 +298,13 @@ dnl
 dnl Checks for header files.
 dnl
 AC_CHECK_HEADERS([stdint.h])
-AC_CHECK_HEADERS([glob.h])
-AM_CONDITIONAL(WITH_GLOB, test "$ac_cv_header_glob_h" = "yes")
 
 dnl Checks for library functions.
-AC_CHECK_DECLS([mmap], [], [], [#include <sys/mman.h>])
 AC_CHECK_DECLS([getentropy], [], [], [#include <sys/random.h>])
+AC_CHECK_DECLS([glob], [], [], [#include <glob.h>])
+AC_CHECK_DECLS([mmap], [], [], [#include <sys/mman.h>])
+
+AM_CONDITIONAL(WITH_GLOB, test "$ac_cv_have_decl_glob" = "yes")
 
 dnl
 dnl Checks for inet libraries

meson.build

@@ -235,7 +235,6 @@ config_h.set_quoted('LOCALEDIR', dir_locale)
 # header files
 xml_check_headers = [
     [ 'stdint.h', true ],
-    [ 'glob.h', true ],
     [ 'poll.h', want_http ],
 ]
 
@@ -248,12 +247,14 @@ endforeach
 # library functions
 xml_check_functions = [
     # fct             | header
-    ['getentropy', 'sys/random.h', 'HAVE_DECL_GETENTROPY'],
-    ['mmap', 'sys/mman.h', 'HAVE_DECL_MMAP'],
+    ['getentropy', 'sys/random.h'],
+    ['glob', 'glob.h'],
+    ['mmap', 'sys/mman.h'],
 ]
 
 foreach function : xml_check_functions
-    config_h.set10(function[2], cc.has_header_symbol(function[1], function[0]))
+    config_h.set10('HAVE_DECL_' + function[0].underscorify().to_upper(),
+                   cc.has_header_symbol(function[1], function[0]))
 endforeach
 
 # library