Drop binary checks when cross-compiling

We don't need to run binaries we just built in order to successfully
build GLib and friends any more.

Since commit b74e2a7, we don't need to run glib-genmarshal when building
GIO; since commit f9eb9eed, all our tests (including the ones that do
need to run binaries we just built) are only built when running "make
check", instead of unconditionally at every build.

This means that we don't need to check for existing, native binaries
when cross-compiling, and fail the configuration step if they are not
found — which also means that you don't need to natively build GLib for
your toolchain, in order to cross-compile GLib.

We can also use the cross-compilation conditional, and skip those tests
that require a binary we just built in order to build.

https://bugzilla.gnome.org/show_bug.cgi?id=753745

configure.ac

@@ -2537,30 +2537,10 @@ int error = EILSEQ;
 ], have_eilseq=yes, have_eilseq=no);
 AC_MSG_RESULT($have_eilseq)
 
-dnl ******************************************************************
+dnl Add a conditional we can use when cross-compiling, so we avoid running
-dnl *** If we are cross-compiling, look for glib-genmarshal and    ***
+dnl binaries
-dnl *** glib-compile-schemas in PATH                               ***
-dnl ******************************************************************
-
 AM_CONDITIONAL(CROSS_COMPILING, test $cross_compiling = yes)
 
-AS_IF([ test $cross_compiling = yes ], [
-  AC_PATH_PROG(GLIB_GENMARSHAL, glib-genmarshal, no)
-  if test x$GLIB_GENMARSHAL = xno; then
-    AC_MSG_ERROR(Could not find a glib-genmarshal in your PATH)
-  fi
-
-  AC_PATH_PROG(GLIB_COMPILE_SCHEMAS, glib-compile-schemas, no)
-  if test x$GLIB_COMPILE_SCHEMAS = xno; then
-    AC_MSG_ERROR(Could not find a glib-compile-schemas in your PATH)
-  fi
-
-  AC_PATH_PROG(GLIB_COMPILE_RESOURCES, glib-compile-resources, no)
-  if test x$GLIB_COMPILE_RESOURCES = xno; then
-    AC_MSG_ERROR(Could not find a glib-compile-resources in your PATH)
-  fi
-])
-
 dnl **************************
 dnl *** Checks for gtk-doc ***
 dnl **************************

gio/tests/Makefile.am

@@ -503,8 +503,10 @@ test_programs += \
 endif
 
 # -----------------------------------------------------------------------------
-#  The resources test is a bit more complicated...
+#  The resources test is a bit more complicated, and we cannot build it when
+#  cross-compiling GIO because it requires running a binary...
 
+if !CROSS_COMPILING
 test_programs += resources
 resources_SOURCES = resources.c
 nodist_resources_SOURCES = test_resources.c test_resources2.c test_resources2.h
@@ -526,11 +528,7 @@ if !ENABLE_INSTALLED_TESTS
 libresourceplugin_la_LDFLAGS += -rpath /
 endif
 
-if CROSS_COMPILING
-  glib_compile_resources=$(GLIB_COMPILE_RESOURCES)
-else
 glib_compile_resources=$(top_builddir)/gio/glib-compile-resources
-endif
 
 resources.o: test_resources2.h
 test_resources.c: test2.gresource.xml Makefile $(shell $(glib_compile_resources) --sourcedir=$(srcdir) --generate-dependencies $(srcdir)/test2.gresource.xml)
@@ -546,8 +544,8 @@ test.gresource: test.gresource.xml Makefile $(shell $(glib_compile_resources) --
 	$(AM_V_GEN) $(glib_compile_resources) --target=$@ --sourcedir=$(srcdir) $<
 
 EXTRA_DIST += test.gresource.xml test1.txt test2.gresource.xml test2.txt test3.gresource.xml test3.txt test4.gresource.xml
-
 CLEANFILES += test_resources.c test_resources2.[ch] plugin_resources.c test.gresource
+endif # !CROSS_COMPILING
 
 BUILT_SOURCES += giotypefuncs.c
 

gobject/tests/Makefile.am

@@ -32,6 +32,12 @@ ifaceproperties_SOURCES = ifaceproperties.c testcommon.h
 
 # -----------------------------------------------------------------------------
 
+# The marshalers test requires running a binary, so we cannot build it when
+# cross-compiling
+
+if !CROSS_COMPILING
+glib_genmarshal=$(top_builddir)/gobject/glib-genmarshal
+
 test_programs += signals
 signals_SOURCES = signals.c
 nodist_signals_SOURCES = marshalers.c marshalers.h
@@ -39,14 +45,10 @@ signals.o: marshalers.h
 CLEANFILES += marshalers.h marshalers.c
 EXTRA_DIST += marshalers.list
 
-if CROSS_COMPILING
-  glib_genmarshal=$(GLIB_GENMARSHAL)
-else
-  glib_genmarshal=$(top_builddir)/gobject/glib-genmarshal
-endif
-
 marshalers.h: Makefile.am marshalers.list
 	$(AM_V_GEN) $(glib_genmarshal) --prefix=test $(srcdir)/marshalers.list --header --valist-marshallers > marshalers.h
 
 marshalers.c: Makefile.am marshalers.h marshalers.list
 	$(AM_V_GEN) (echo "#include \"marshalers.h\""; $(glib_genmarshal) --prefix=test $(srcdir)/marshalers.list --body --valist-marshallers) > $@.tmp && mv $@.tmp $@
+
+endif # !CROSS_COMPILING

tests/gobject/Makefile.am

@@ -48,11 +48,10 @@ if ENABLE_TIMELOOP
 installed_test_programs += timeloop-closure
 endif
 
-if CROSS_COMPILING
+# The marshal test requires running a binary, which means we cannot
-  glib_genmarshal=$(GLIB_GENMARSHAL)
+# build it when cross-compiling
-else
+if !CROSS_COMPILING
 glib_genmarshal=$(top_builddir)/gobject/glib-genmarshal
-endif
 
 testmarshal.h: stamp-testmarshal.h
 	@true
@@ -68,14 +67,9 @@ testmarshal.c: @REBUILD@ testmarshal.h testmarshal.list $(glib_genmarshal)
 
 BUILT_SOURCES += testmarshal.h testmarshal.c
 CLEANFILES += stamp-testmarshal.h
-
+EXTRA_DIST += testcommon.h testmarshal.list
-EXTRA_DIST += \
+BUILT_EXTRA_DIST += testmarshal.h testmarshal.c
-	testcommon.h				\
+endif # !CROSS_COMPILING
-	testmarshal.list
-
-BUILT_EXTRA_DIST += \
-	testmarshal.h				\
-	testmarshal.c
 
 dist-hook: $(BUILT_EXTRA_DIST)
 	files='$(BUILT_EXTRA_DIST)';				\