Added option to disable building of examples

Makefile.am

@@ -20,10 +20,14 @@ libquirc_la_SOURCES = lib/decode.c \
 libquirc_la_LIBADD = $(SYS_LIBS)
 libquirc_la_LDFLAGS = -version-info $(VERSION_INFO)
 
-bin_PROGRAMS = quirc-demo \
-	quirc-scanner
+bin_PROGRAMS =
+noinst_PROGRAMS =
 
-noinst_PROGRAMS = qrtest \
+if COMPILE_EXAMPLES
+
+bin_PROGRAMS += quirc-demo \
+	quirc-scanner
+noinst_PROGRAMS += qrtest \
 	inspect
 
 DEMO_SOURCES = \
@@ -47,6 +51,8 @@ quirc_demo_LDADD = libquirc.la -ljpeg $(sdl_LIBS) -lSDL_gfx
 quirc_scanner_SOURCES = $(DEMO_SOURCES) tests/dbgutil.c demo/scanner.c
 quirc_scanner_LDADD = libquirc.la -ljpeg
 
+endif
+
 AM_CPPFLAGS = -I$(srcdir)/lib $(SYS_INCLUDES)
 
 DISTCLEANFILES = ./lib/quirc-config.h

configure.ac

@@ -19,16 +19,30 @@ AC_PROG_LN_S
 
 AC_HEADER_STDC
 
-PKG_CHECK_MODULES(sdl, sdl)
-AC_SUBST(sdl_CFLAGS)
-AC_SUBST(sdl_LIBS)
+AC_ARG_ENABLE([quirc-examples],
+    AS_HELP_STRING([--disable-quirc-examples  disable compilation of examples]),
+    [], [enable_compile_examples=yes])
+
+AC_MSG_CHECKING(whether to disable building of examples)
+if test "$enable_compile_examples" = "yes"; then
+  AC_MSG_RESULT(no)
+
+  PKG_CHECK_MODULES(sdl, sdl)
+  AC_SUBST(sdl_CFLAGS)
+  AC_SUBST(sdl_LIBS)
+
+  AC_CHECK_HEADERS(setjmp.h jpeglib.h)
+  AC_CHECK_HEADERS(linux/videodev2.h linux/videodev.h)
+else
+  AC_MSG_RESULT(yes)
+fi
+
+AM_CONDITIONAL([COMPILE_EXAMPLES], [test "$enable_compile_examples" = "yes"])
 
-AC_CHECK_HEADERS(setjmp.h jpeglib.h)
-AC_CHECK_HEADERS(linux/videodev2.h linux/videodev.h)
 AC_SEARCH_LIBS([rint], [m])
 
-AC_ARG_ENABLE(large-images,
-    [  --enable-large-images   enable decoding of large images],
+AC_ARG_ENABLE([large-images],
+    AS_HELP_STRING([--enable-large-images  enable decoding of large images]),
     [large_images=true],
     [large_images=false])