Makefile: pass include directives to dtc via CPPFLAGS, not CFLAGS

The dtc submodule's makefile expects -I include directives to be
in CPPFLAGS, not CFLAGS. Getting this wrong meant that the include
directive would not be applied when generating the dependency .d
files. This in turn meant that we couldn't build libfdt when
doing an out of tree build with clang. (gcc's dependency output
is slightly different from clang in this situation so it happened
to work.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
1 file changed
tree: fe6e4dfe0878a63b3d7a405b082c3a9a73506878
  1. audio/
  2. backends/
  3. block/
  4. bsd-user/
  5. default-configs/
  6. disas/
  7. docs/
  8. fpu/
  9. fsdev/
  10. gdb-xml/
  11. hw/
  12. include/
  13. ldscripts/
  14. libcacard/
  15. linux-headers/
  16. linux-user/
  17. net/
  18. pc-bios/
  19. po/
  20. qapi/
  21. qga/
  22. QMP/
  23. qobject/
  24. qom/
  25. roms/
  26. scripts/
  27. slirp/
  28. stubs/
  29. sysconfigs/
  30. target-alpha/
  31. target-arm/
  32. target-cris/
  33. target-i386/
  34. target-lm32/
  35. target-m68k/
  36. target-microblaze/
  37. target-mips/
  38. target-moxie/
  39. target-openrisc/
  40. target-ppc/
  41. target-s390x/
  42. target-sh4/
  43. target-sparc/
  44. target-unicore32/
  45. target-xtensa/
  46. tcg/
  47. tests/
  48. trace/
  49. ui/
  50. util/
  51. .exrc
  52. .gitignore
  53. .gitmodules
  54. .mailmap
  55. aio-posix.c
  56. aio-win32.c
  57. arch_init.c
  58. async.c
  59. balloon.c
  60. block-migration.c
  61. block.c
  62. blockdev-nbd.c
  63. blockdev.c
  64. blockjob.c
  65. bt-host.c
  66. bt-vhci.c
  67. Changelog
  68. CODING_STYLE
  69. configure
  70. COPYING
  71. COPYING.LIB
  72. coroutine-gthread.c
  73. coroutine-sigaltstack.c
  74. coroutine-ucontext.c
  75. coroutine-win32.c
  76. cpu-exec.c
  77. cpus.c
  78. cputlb.c
  79. device-hotplug.c
  80. device_tree.c
  81. disas.c
  82. dma-helpers.c
  83. dump.c
  84. exec.c
  85. gdbstub.c
  86. HACKING
  87. hmp-commands.hx
  88. hmp.c
  89. hmp.h
  90. iohandler.c
  91. ioport.c
  92. kvm-all.c
  93. kvm-stub.c
  94. LICENSE
  95. main-loop.c
  96. MAINTAINERS
  97. Makefile
  98. Makefile.objs
  99. Makefile.target
  100. memory.c
  101. memory_mapping.c
  102. migration-exec.c
  103. migration-fd.c
  104. migration-tcp.c
  105. migration-unix.c
  106. migration.c
  107. monitor.c
  108. nbd.c
  109. os-posix.c
  110. os-win32.c
  111. page_cache.c
  112. qapi-schema-test.json
  113. qapi-schema.json
  114. qdev-monitor.c
  115. qdict-test-data.txt
  116. qemu-bridge-helper.c
  117. qemu-char.c
  118. qemu-coroutine-io.c
  119. qemu-coroutine-lock.c
  120. qemu-coroutine-sleep.c
  121. qemu-coroutine.c
  122. qemu-doc.texi
  123. qemu-img-cmds.hx
  124. qemu-img.c
  125. qemu-img.texi
  126. qemu-io-cmds.c
  127. qemu-io.c
  128. qemu-log.c
  129. qemu-nbd.c
  130. qemu-nbd.texi
  131. qemu-options-wrapper.h
  132. qemu-options.h
  133. qemu-options.hx
  134. qemu-seccomp.c
  135. qemu-tech.texi
  136. qemu-timer.c
  137. qemu.sasl
  138. qmp-commands.hx
  139. qmp.c
  140. qtest.c
  141. readline.c
  142. README
  143. rules.mak
  144. savevm.c
  145. spice-qemu-char.c
  146. tcg-runtime.c
  147. tci.c
  148. thread-pool.c
  149. thunk.c
  150. tpm.c
  151. trace-events
  152. translate-all.c
  153. translate-all.h
  154. user-exec.c
  155. VERSION
  156. version.rc
  157. vl.c
  158. xbzrle.c
  159. xen-all.c
  160. xen-mapcache.c
  161. xen-stub.c