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100 lines
4.2 KiB
Makefile
100 lines
4.2 KiB
Makefile
# Helper code for the make build system in Mbed TLS: define some variables
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# providing information such as file paths.
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# This file is only meant to exist for a short transition period.
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# It may change or be removed without notice.
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# Do not use it if you are not Mbed TLS!
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# Assume that this makefile is located in a first-level subdirectory of the
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# Mbed TLS root, and is accessed directly (not via VPATH or such).
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# If this is not the case, TF_PSA_CRYPTO_PATH or MBEDTLS_PATH must be defined
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# before including this file.
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ifneq ($(origin TF_PSA_CRYPTO_PATH), undefined)
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# TF_PSA_CRYPTO_PATH was defined before including this file, good.
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else ifneq ($(origin MBEDTLS_PATH), undefined)
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TF_PSA_CRYPTO_PATH := $(MBEDTLS_PATH)/tf-psa-crypto
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else
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# $(dir $(lastword $(MAKEFILE_LIST))) is the path to this file, possibly
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# a relative path, with a trailing slash. Strip off another directory
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# from that.
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TF_PSA_CRYPTO_PATH := $(patsubst %/,%,$(dir $(patsubst %/,%,$(dir $(lastword $(MAKEFILE_LIST))))))/tf-psa-crypto
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endif
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ifeq (,$(wildcard $(TF_PSA_CRYPTO_PATH)/core/psa_crypto.c))
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$(error $$(TF_PSA_CRYPTO_PATH)/core/psa_crypto.c not found)
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endif
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TF_PSA_CRYPTO_CORE_PATH = $(TF_PSA_CRYPTO_PATH)/core
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TF_PSA_CRYPTO_DRIVERS_BUILTIN_SRC_PATH = $(TF_PSA_CRYPTO_PATH)/drivers/builtin/src
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# Gather information about crypto drivers that are separate from the main
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# "builtin" driver (historically located in /3rdparty in Mbed TLS 2.x/3.x).
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THIRDPARTY_DIR := $(TF_PSA_CRYPTO_PATH)/drivers
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THIRDPARTY_INCLUDES =
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include $(TF_PSA_CRYPTO_PATH)/drivers/everest/Makefile.inc
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include $(TF_PSA_CRYPTO_PATH)/drivers/p256-m/Makefile.inc
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# Directories with headers of public interfaces of TF-PSA-Crypto
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TF_PSA_CRYPTO_LIBRARY_PUBLIC_INCLUDE = \
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-I$(TF_PSA_CRYPTO_PATH)/include \
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-I$(TF_PSA_CRYPTO_PATH)/drivers/builtin/include \
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$(THIRDPARTY_INCLUDES)
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# Directories with headers of internal interfaces of TF-PSA-Crypto
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# (currently consumed by Mbed TLS, eventually not so when we've finished
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# cleaning up)
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TF_PSA_CRYPTO_LIBRARY_PRIVATE_INCLUDE = \
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-I$(TF_PSA_CRYPTO_CORE_PATH) \
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-I$(TF_PSA_CRYPTO_DRIVERS_BUILTIN_SRC_PATH)
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# Extra linker flags required by the crypto library or the platform
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TF_PSA_CRYPTO_EXTRA_LDFLAGS =
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## Usage: $(call remove_enabled_options_crypto,PREPROCESSOR_INPUT)
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## Remove the preprocessor symbols that are set in the current configuration
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## from PREPROCESSOR_INPUT. Also normalize whitespace.
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## Example:
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## $(call remove_enabled_options_crypto,MBEDTLS_FOO MBEDTLS_BAR)
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## This expands to an empty string "" if MBEDTLS_FOO and MBEDTLS_BAR are both
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## enabled in the TF-PSA-Crypto configuration, to "MBEDTLS_FOO" if
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## MBEDTLS_BAR is enabled but MBEDTLS_FOO is disabled, etc.
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##
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## This only works with a Unix-like shell environment (Bourne/POSIX-style shell
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## and standard commands) and a Unix-like compiler (supporting -E). In
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## other environments, the output is likely to be empty.
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define remove_enabled_options_crypto
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$(strip $(shell
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exec 2>/dev/null;
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{ echo '#include <tf-psa-crypto/build_info.h>'; echo $(1); } |
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$(CC) $(TF_PSA_CRYPTO_LIBRARY_PUBLIC_INCLUDE) $(CFLAGS) -E - |
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tail -n 1
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))
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endef
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# Ensure that `THREADING` is always defined. This lets us get a clean run
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# with `make --warn-undefined-variables` without making the conditionals
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# below more complex than they already are. At this stage, if `$(THREADING)`
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# is empty, it means we don't know yet whether the threading implementation
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# requires extra `LDFLAGS`. Once we've done the analysis, if `$(THREADING)`
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# is empty, it will mean that no extra `LDFLAGS` are required, either
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# because threading is disabled or because the threading implementation
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# doesn't require any extra `LDFLAGS`.
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THREADING ?=
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ifndef WINDOWS_BUILD
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ifeq ($(THREADING),)
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# Auto-detect configurations with pthread.
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# If the call to remove_enabled_options returns "control", the symbols
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# are confirmed set and we link with pthread.
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# If the auto-detection fails, the result of the call is empty and
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# we keep THREADING undefined.
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ifeq (control,$(call remove_enabled_options_crypto,control MBEDTLS_THREADING_C MBEDTLS_THREADING_PTHREAD))
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THREADING := pthread
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endif
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endif
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#$(info THREADING = $(THREADING))
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ifeq ($(THREADING),pthread)
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TF_PSA_CRYPTO_EXTRA_LDFLAGS += -lpthread
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endif
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endif
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