scripts/mk/buildflags.mk

   1 # This Makefile fragment (since dpkg 1.16.1) defines the following host
   2 # variables:
   3 #
   4 #   ASFLAGS: flags for the host assembler (since 1.21.0).
   5 #   CFLAGS: flags for the host C compiler.
   6 #   CPPFLAGS: flags for the host C preprocessor.
   7 #   CXXFLAGS: flags for the host C++ compiler.
   8 #   OBJCFLAGS: flags for the host Objective C compiler.
   9 #   OBJCXXFLAGS: flags for the host Objective C++ compiler.
  10 #   DFLAGS: flags for the host D compiler.
  11 #   FFLAGS: flags for the host Fortran 77 compiler.
  12 #   FCFLAGS: flags for the host Fortran 9x compiler.
  13 #   LDFLAGS: flags for the host linker.
  14 #
  15 # And the following variables for the build tools (since dpkg 1.22.1):
  16 #
  17 #   ASFLAGS_FOR_BUILD: flags for the build assembler.
  18 #   CFLAGS_FOR_BUILD: flags for the build C compiler.
  19 #   CPPFLAGS_FOR_BUILD: flags for the build C preprocessor.
  20 #   CXXFLAGS_FOR_BUILD: flags for the build C++ compiler.
  21 #   OBJCFLAGS_FOR_BUILD: flags for the build Objective C compiler.
  22 #   OBJCXXFLAGS_FOR_BUILD: flags for the build Objective C++ compiler.
  23 #   DFLAGS_FOR_BUILD: flags for the build D compiler.
  24 #   FFLAGS_FOR_BUILD: flags for the build Fortran 77 compiler.
  25 #   FCFLAGS_FOR_BUILD: flags for the build Fortran 9x compiler.
  26 #   LDFLAGS_FOR_BUILD: flags for the build linker.
  27 #
  28 # You can also export them in the environment by setting
  29 # DPKG_EXPORT_BUILDFLAGS to a non-empty value.
  30 #
  31 # Note:
  32 # - Only documented variables are considered public interfaces.
  33 # - Expects to be included from the source tree root directory.
  34
  35 ifndef dpkg_buildflags_mk_included
  36 dpkg_buildflags_mk_included = yes
  37
  38 # This list is kept in sync with the default set of flags returned
  39 # by dpkg-buildflags.
  40
  41 dpkg_lazy_eval ?= $$(or $$(value DPKG_CACHE_$(1)),$$(eval DPKG_CACHE_$(1) := $$(shell $(2)))$$(value DPKG_CACHE_$(1)))
  42
  43 DPKG_BUILDFLAGS_LIST := $(foreach var,\
  44   ASFLAGS \
  45   CFLAGS \
  46   CPPFLAGS \
  47   CXXFLAGS \
  48   OBJCFLAGS \
  49   OBJCXXFLAGS \
  50   DFLAGS \
  51   FFLAGS \
  52   FCFLAGS \
  53   LDFLAGS \
  54   ,$(var) $(var)_FOR_BUILD)
  55
  56 define dpkg_buildflags_export_envvar
  57   ifdef $(1)
  58     DPKG_BUILDFLAGS_EXPORT_ENVVAR += $(1)="$$(value $(1))"
  59   endif
  60 endef
  61
  62 $(eval $(call dpkg_buildflags_export_envvar,DEB_BUILD_OPTIONS))
  63 $(eval $(call dpkg_buildflags_export_envvar,DEB_BUILD_MAINT_OPTIONS))
  64 $(eval $(call dpkg_buildflags_export_envvar,DEB_BUILD_PATH))
  65 $(foreach flag,$(DPKG_BUILDFLAGS_LIST),\
  66   $(foreach operation,SET STRIP APPEND PREPEND,\
  67     $(eval $(call dpkg_buildflags_export_envvar,DEB_$(flag)_MAINT_$(operation)))))
  68
  69 dpkg_buildflags_setvar = $(1) = $(call dpkg_lazy_eval,$(1),$(DPKG_BUILDFLAGS_EXPORT_ENVVAR) dpkg-buildflags --get $(1))
  70
  71 $(foreach flag,$(DPKG_BUILDFLAGS_LIST),\
  72   $(eval $(call dpkg_buildflags_setvar,$(flag))))
  73
  74 ifdef DPKG_EXPORT_BUILDFLAGS
  75   export $(DPKG_BUILDFLAGS_LIST)
  76 endif
  77
  78 endif # dpkg_buildflags_mk_included