Add erlang:system_info(build_type)

Added erlang:system_info(build_type) which makes it
easier to chose drivers, NIF libraries, etc based
on build type of the runtime system.

4 files changed, 42 insertions, 1 deletions

diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index 1eec45e0f3..cd3bcd3a07 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -5456,6 +5456,16 @@ true</pre>
 	    <seealso marker="#system_info_allocator_tuple">erlang:system_info({allocator, Alloc})</seealso>.
 	    </p>
           </item>
+          <tag><c>build_type</c></tag>
+          <item>
+            <p>Returns an atom describing the build type of the runtime
+	       system. This is normally the atom <c>opt</c> for optimized.
+               Other possible return values are <c>debug</c>, <c>purify</c>,
+	       <c>quantify</c>, <c>purecov</c>, <c>gcov</c>, <c>valgrind</c>,
+	       <c>gprof</c>, and <c>lcnt</c>. Possible return values
+	       may be added and/or removed at any time without prior notice.
+	     </p>
+          </item>
           <tag><c>c_compiler_used</c></tag>
           <item>
             <p>Returns a two-tuple describing the C compiler used when
diff --git a/erts/emulator/Makefile.in b/erts/emulator/Makefile.in
index ed0d1b3fa6..903abe6f5c 100644
--- a/erts/emulator/Makefile.in
+++ b/erts/emulator/Makefile.in
@@ -74,7 +74,7 @@ else
 ifeq ($(TYPE),gcov)
 PURIFY = 
 TYPEMARKER = .gcov
-TYPE_FLAGS = @DEBUG_CFLAGS@ -DNO_JUMP_TABLE -fprofile-arcs -ftest-coverage -O0 -DERTS_CAN_INLINE=0 -DERTS_INLINE=
+TYPE_FLAGS = @DEBUG_CFLAGS@ -DERTS_GCOV -DNO_JUMP_TABLE -fprofile-arcs -ftest-coverage -O0 -DERTS_CAN_INLINE=0 -DERTS_INLINE=
 ifneq ($(findstring solaris,$(TARGET)),solaris)
 LIBS += -lgcov
 endif
diff --git a/erts/emulator/beam/atom.names b/erts/emulator/beam/atom.names
index 0815cdbc7f..327620772f 100644
--- a/erts/emulator/beam/atom.names
+++ b/erts/emulator/beam/atom.names
@@ -119,6 +119,7 @@ atom bsl
 atom bsr
 atom bsr_anycrlf
 atom bsr_unicode
+atom build_type
 atom busy_dist_port
 atom busy_port
 atom call
@@ -378,6 +379,7 @@ atom old_heap_size
 atom on_load
 atom open
 atom open_error
+atom opt
 atom or
 atom ordered_set
 atom orelse
diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c
index dace5b9297..40d8dc097c 100644
--- a/erts/emulator/beam/erl_bif_info.c
+++ b/erts/emulator/beam/erl_bif_info.c
@@ -1955,6 +1955,35 @@ BIF_RETTYPE system_info_1(BIF_ALIST_1)
 		    : am_enabled);
 	}
 #endif
+    } else if (BIF_ARG_1 == am_build_type) {
+#if defined(DEBUG)
+	ERTS_DECL_AM(debug);
+	BIF_RET(AM_debug);
+#elif defined(PURIFY)
+	ERTS_DECL_AM(purify);
+	BIF_RET(AM_purify);
+#elif defined(QUANTIFY)
+	ERTS_DECL_AM(quantify);
+	BIF_RET(AM_quantify);
+#elif defined(PURECOV)
+	ERTS_DECL_AM(purecov);
+	BIF_RET(AM_purecov);
+#elif defined(ERTS_GCOV)
+	ERTS_DECL_AM(gcov);
+	BIF_RET(AM_gcov);
+#elif defined(VALGRIND)
+	ERTS_DECL_AM(valgrind);
+	BIF_RET(AM_valgrind);
+#elif defined(GPROF)
+	ERTS_DECL_AM(gprof);
+	BIF_RET(AM_gprof);
+#elif defined(ERTS_ENABLE_LOCK_COUNT)
+	ERTS_DECL_AM(lcnt);
+	BIF_RET(AM_lcnt);
+#else
+	BIF_RET(am_opt);
+#endif
+	BIF_RET(res);
     } else if (BIF_ARG_1 == am_allocated_areas) {
 	res = erts_allocated_areas(NULL, NULL, BIF_P);
 	BIF_RET(res);