Makefile.am:
TESTS += test-c-strcase.sh
-TESTS_ENVIRONMENT += EXEEXT='@EXEEXT@' LOCALE_FR='@LOCALE_FR@' LOCALE_TR_UTF8='@LOCALE_TR_UTF8@'
+TESTS_ENVIRONMENT += LOCALE_FR='@LOCALE_FR@' LOCALE_TR_UTF8='@LOCALE_TR_UTF8@'
check_PROGRAMS += test-c-strcasecmp test-c-strncasecmp