otool <=> ldd. Conditional ASAN

Figured out that otool -L has the equivalent side-effect as ldd.

Given the issue that the Address Sanitizer (ASAN) libraries shouldn’t be linked aside from testing, I’ve worked out how to do conditionals in autotools:

diff --git a/configure.ac b/configure.ac
index 5dfdb11..0ffd341 100644
--- a/configure.ac
+++ b/configure.ac
@@ -23,6 +23,18 @@ AC_PROG_MAKE_SET
 
 # Checks for library functions.
 
+# Conditionals
+
+## Enable ASAN
+AC_ARG_ENABLE([asan],
+[  --enable-asan    Turn on Address Sanitizer],
+[ case "${enableval}" in
+    yes) asan=true ;;
+    no)  asan=false ;;
+    *) AC_MSG_ERROR([bad value ${enableval} for --enable-asan]) ;;
+esac],[asan=false])
+AM_CONDITIONAL([ASAN], [test x$asan = xtrue])
+
 AC_CONFIG_FILES([Makefile
                  src/Makefile])
 AC_OUTPUT
diff --git a/src/Makefile.am b/src/Makefile.am
index a99c4ed..733e8c9 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,4 +1,5 @@
-_debug_flags=-fsanitize=address \
+if ASAN
+_asan_debug_flags=-fsanitize=address \
              -fsanitize=alignment -fsanitize=bool \
              -fsanitize=bounds -fsanitize=enum -fsanitize=enum \
              -fsanitize=float-cast-overflow -fsanitize=float-divide-by-zero \
@@ -8,18 +9,23 @@ _debug_flags=-fsanitize=address \
              -fsanitize=signed-integer-overflow -fsanitize=unreachable \
              -fsanitize=unsigned-integer-overflow -fsanitize=vla-bound \
              -fsanitize=vptr
-_debug_ldflags=-fsanitize-memory-track-origins
-AM_CPPFLAGS = -Wall -Werror -Wextra $(_debug_flags)
+_asan_debug_ldflags=-fsanitize-memory-track-origins
+else
+_asan_debug_flags=
+_asan_debug_ldflags=
+endif
+
+AM_CPPFLAGS = -Wall -Werror -Wextra $(_asan_debug_flags)
 bin_PROGRAMS = runtime
 runtime_SOURCES = runtime.cpp
 runtime_CPPFLAGS = -I$(top_srcdir)/build/jemalloc/include \
                    -I$(top_srcdir)/build/cvmi/include $(AM_CPPFLAGS)
-runtime_LDFLAGS = $(_debug_flags) $(_debug_ldflags)
+runtime_LDFLAGS = $(_asan_debug_flags) $(_asan_debug_ldflags)
 runtime_LDADD = $(top_srcdir)/build/jemalloc/lib/libjemalloc.a
 
 lib_LTLIBRARIES = libjvm.la
 libjvm_la_SOURCES = runtime.cpp
 libjvm_la_CPPFLAGS = -fPIC -I$(top_srcdir)/build/jemalloc/include \
                      -I$(top_srcdir)/build/cvmi/include $(AM_CPPFLAGS)
-libjvm_la_LDFLAGS = -fPIC -avoid-version $(_debug_flags) $(_debug_ldflags)
+libjvm_la_LDFLAGS = -fPIC -avoid-version $(_asan_debug_flags) $(_asan_debug_ldflags)
 libjvm_la_LIBADD = $(top_srcdir)/build/jemalloc/lib/libjemalloc_pic.a

#java