test: add function for checking config.h in tests

test/simulation/008-ntpera

@@ -16,7 +16,7 @@ check_packet_interval || test_fail
 check_sync || test_fail
 
 # The following tests need 64-bit time_t
-grep -q 'HAVE_LONG_TIME_T 1' ../../config.h || test_skip
+check_config_h 'HAVE_LONG_TIME_T 1' || test_skip
 
 for year in 1990 2090; do
 	export CLKNETSIM_START_DATE=$(date -d "Jan  1 00:00:00 UTC $year" +'%s')

test/simulation/105-ntpauth

@@ -23,7 +23,7 @@ EOF
 
 keys=4
 
-if grep -q 'FEAT_SECHASH 1' ../../config.h; then
+if check_config_h 'FEAT_SECHASH 1'; then
 	hashes="MD5 SHA1 SHA256 SHA384 SHA512"
 else
 	hashes="MD5"

test/simulation/115-cmdmontime

@@ -5,7 +5,7 @@
 test_start "cmdmon timestamps"
 
 # The following tests need 64-bit time_t
-grep -q 'HAVE_LONG_TIME_T 1' ../../config.h || test_skip
+check_config_h 'HAVE_LONG_TIME_T 1' || test_skip
 
 limit=2
 client_server_options="noselect"

test/simulation/133-hwtimestamp

@@ -20,7 +20,7 @@ check_chronyd_exit || test_fail
 check_source_selection || test_fail
 check_sync || test_fail
 
-if grep -q 'FEAT_DEBUG 1' ../../config.h; then
+if check_config_h 'FEAT_DEBUG 1'; then
 	check_log_messages "HW clock samples" 190 200 || test_fail
 	check_log_messages "HW clock reset" 0 0 || test_fail
 	check_log_messages "Received.*tss=1" 1 1 || test_fail

test/simulation/test.common

@@ -211,6 +211,12 @@ get_chronyd_conf() {
 	fi
 }
 
+# Check if chrony was built with specified option in config.h
+check_config_h() {
+	local pattern=$1
+	grep -q "^#define $pattern" ../../config.h
+}
+
 # Check if the clock was well synchronized
 check_sync() {
 	local i sync_time max_time_error max_freq_error ret=0