[lttng-dev] [lttng-ust PATCH 1/2] Add sdt.h integration option

[Alexandre Montplaisir]

It is not wired to anything yet, but we can at least build
the package with that option enabled.

Signed-off-by: Alexandre Montplaisir <alexandre.montplaisir at gmail.com>
---
 configure.ac              |   20 ++++++++++++++++++++
 include/lttng/config.h.in |    2 ++
 2 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/configure.ac b/configure.ac
index 5c646cb..e175840 100644
--- a/configure.ac
+++ b/configure.ac
@@ -16,8 +16,11 @@ AC_CONFIG_MACRO_DIR([config])
 AM_INIT_AUTOMAKE([foreign])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 AC_CONFIG_SRCDIR([include/lttng/tracepoint.h])
+
+# Configuration options, which will be installed in the config.h
 AC_CONFIG_HEADERS([config.h include/lttng/config.h])
 AH_TEMPLATE([HAVE_EFFICIENT_UNALIGNED_ACCESS], [Use efficient unaligned access.])
+AH_TEMPLATE([HAVE_SDT_INTEGRATION], [DTrace/GDB/SystemTap integration via sdt.h])
 
 # Compute minor/major/patchlevel version numbers
 AC_PROG_SED
@@ -206,6 +209,23 @@ Use the --with-java-jdk=DIR flag to point to your Java include files, or disable
 ])
 AM_CONDITIONAL([BUILD_JNI_INTERFACE], [test "x$jni_interface" = "xyes"])
 
+# sdt.h integration
+AC_ARG_WITH([sdt],
+	[AS_HELP_STRING([--with-sdt],[provide DTrace, GDB and SystemTap integration via sdt.h [default=no]])],
+	[with_sdt=$withval],
+	[with_sdt="no"]
+)
+
+AS_IF([test "x$with_sdt" = "xyes"],[
+	AC_CHECK_HEADERS([sys/sdt.h], [
+		AC_DEFINE([HAVE_SDT_INTEGRATION], [1])
+	],[
+		AC_MSG_ERROR([The sdt.h integration was requested
+but this header file cannot be found. Make sure it is installed
+or use CFLAGS=-I/path/ to specify a non-standard path to sys/sdt.h])
+	])
+])
+
 #currently disabled.
 	#tests/hello2/Makefile
 	#tests/basic/Makefile
diff --git a/include/lttng/config.h.in b/include/lttng/config.h.in
index b619095..c87b97e 100644
--- a/include/lttng/config.h.in
+++ b/include/lttng/config.h.in
@@ -3,3 +3,5 @@
 /* Use efficient unaligned access. */
 #undef HAVE_EFFICIENT_UNALIGNED_ACCESS
 
+/* DTrace/GDB/SystemTap integration via sdt.h */
+#undef HAVE_SDT_INTEGRATION
-- 
1.7.9