# by the --with option name, to make things easier for the users :-)
AST_EXT_LIB_SETUP([ALSA], [Advanced Linux Sound Architecture], [asound])
+
+# BKTR is used for backtrace support on platforms that do not
+# have it natively.
AST_EXT_LIB_SETUP([BKTR], [Stack Backtrace support], [execinfo])
AST_EXT_LIB_SETUP([CAP], [POSIX 1.e capabilities], [cap])
AST_EXT_LIB_SETUP([CURL], [cURL], [curl])
AST_EXT_LIB_CHECK([OSPTK], [osptk], [OSPPCryptoDecrypt], [osp/osp.h], [-lcrypto -lssl])
+AST_EXT_LIB_CHECK([BKTR], [execinfo], [backtrace], [execinfo.h], [-lexecinfo])
+
# possible places for oss definitions
AST_EXT_LIB_CHECK([OSS], [ossaudio], [], [linux/soundcard.h])
AST_EXT_LIB_CHECK([OSS], [ossaudio], [], [sys/soundcard.h])