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build: sanitize user environment variables

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Certain environment variables or command-line overrides
can result in difficult-to-diagnose build issues.  These
variables are now filtered from the calling environment
prior to invoking the lower level makefiles.

These variables which may affect gcc are removed from the
environment and from the command-line overrides:
  TMPDIR GCC_EXEC_PREFIX COMPILER_PATH LIBRARY_PATH
  CFLAGS CPATH C_INCLUDE_PATH CPLUS_INCLUDE_PATH
  OBJC_INCLUDE_PATH DEPENDENCIES_OUTPUT

These variables which are now deprecated are removed from
the environment and from the command-line overrides:
  USE_BOOTLOADER
This commit is contained in:
Stacey Sheldon 2011-04-24 18:21:26 -04:00
parent 29ec2f198b
commit 4028c0b2ee
1 changed files with 20 additions and 0 deletions
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20
Makefile
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@ -4,6 +4,26 @@ TOOLS_DIR=$(ROOT_DIR)/tools
BUILD_DIR=$(ROOT_DIR)/build
DL_DIR=$(ROOT_DIR)/downloads
# Clean out undesirable variables from the environment and command-line
# to remove the chance that they will cause problems with our build
define SANITIZE_VAR
$(if $(filter-out undefined,$(origin $(1))),
$(info *NOTE* Sanitized $(2) variable '$(1)' from $(origin $(1)))
MAKEOVERRIDES = $(filter-out $(1)=%,$(MAKEOVERRIDES))
override $(1) :=
unexport $(1)
)
endef
# These specific variables can influence gcc in unexpected (and undesirable) ways
SANITIZE_GCC_VARS := TMPDIR GCC_EXEC_PREFIX COMPILER_PATH LIBRARY_PATH
SANITIZE_GCC_VARS += CFLAGS CPATH C_INCLUDE_PATH CPLUS_INCLUDE_PATH OBJC_INCLUDE_PATH DEPENDENCIES_OUTPUT
$(foreach var, $(SANITIZE_GCC_VARS), $(eval $(call SANITIZE_VAR,$(var),disallowed)))
# These specific variables used to be valid but now they make no sense
SANITIZE_DEPRECATED_VARS := USE_BOOTLOADER
$(foreach var, $(SANITIZE_DEPRECATED_VARS), $(eval $(call SANITIZE_VAR,$(var),deprecated)))
# We almost need to consider autoconf/automake instead of this
# I don't know if windows supports uname :-(
QT_SPEC=win32-g++