tests/common/43: Better, more descriptive error messages

test cases/common/43 has function/meson.build

@@ -3,16 +3,16 @@ project('has function', 'c')
 cc = meson.get_compiler('c')
 
 if not cc.has_function('printf', prefix : '#include<stdio.h>')
-  error('Existing function not found.')
+  error('"printf" function not found (should always exist).')
 endif
 
 # Should also be able to detect it without specifying the header
 # We check for a different function here to make sure the result is
 # not taken from a cache (ie. the check above)
-assert(cc.has_function('fprintf'), 'Existing function not found without include')
+assert(cc.has_function('fprintf'), '"fprintf" function not found without include (should always exist).')
 
 if cc.has_function('hfkerhisadf', prefix : '#include<stdio.h>')
-  error('Found non-existant function.')
+  error('Found non-existent function "hfkerhisadf".')
 endif
 
 # With glibc on Linux lchmod is a stub that will always return an error,
@@ -21,9 +21,9 @@ endif
 # implemented in glibc it's probably not implemented in any other 'slimmer'
 # C library variants either, so the check should be safe either way hopefully.
 if host_machine.system() == 'linux' and cc.get_id() == 'gcc'
-  assert (cc.has_function('poll', prefix : '#include <poll.h>'), 'couldn\'t detect poll when defined by a header')
+  assert (cc.has_function('poll', prefix : '#include <poll.h>'), 'couldn\'t detect "poll" when defined by a header')
   assert (not cc.has_function('lchmod', prefix : '''#include <sys/stat.h>
-                                                    #include <unistd.h>'''), 'lchmod check should have failed')
+                                                    #include <unistd.h>'''), '"lchmod" check should have failed')
 endif
 
 # For some functions one needs to define _GNU_SOURCE before including the
@@ -31,5 +31,5 @@ endif
 # as well without any prefix
 if cc.has_header_symbol('sys/socket.h', 'recvmmsg', prefix : '#define _GNU_SOURCE')
   # We assume that if recvmmsg exists sendmmsg does too
-  assert (cc.has_function('sendmmsg'), 'Failed to detect existing function')
+  assert (cc.has_function('sendmmsg'), 'Failed to detect function "sendmmsg" (should always exist).')
 endif