Check if compiler is apple cc
* Makefile.in (ASFLAGS): new variable
(TARGET_ASFLAGS): likewise
(TARGET_MODULE_FORMAT): likewise
(TARGET_APPLE_CC): likewise
(OBJCONV): likewise
(TARGET_IMG_CFLAGS): likewise
(TARGET_CPPFLAGS): add includedir
* configure.ac: call grub_apple_cc and grub_apple_target_cc
(TARGET_IMG_LDFLAGS): Add -Wl,-Ttext,. All users updated
Check for linker script only if compiler isn't Apple's CC
(TARGET_MODULE_FORMAT): set
(TARGET_APPLE_CC): likewise
(TARGET_ASFLAGS): likewise
(ASFLAGS): likewise
Check for objcopy only if compiler isn't Apple's CC
Check for BSS symbol only if compiler isn't Apple's CC
* genmk.rb: adapt nm options if we use Apple's utils
* aclocal.m4 (grub_apple_cc): new test
(grub_apple_target_cc): likewise
2b167a7218