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makefile: add support for building on macOS

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On macOS the readlink command does not include a -f flag. Instead default
to using GNU readlink (which is often installed as greadlink).

Signed-off-by: Alex Richardson <Alexander.Richardson@cl.cam.ac.uk>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Alex Richardson
2020-02-06 09:57:34 +05:30
committed by Anup Patel
parent 2c2bbe7374
commit 5ff1ab0ed8
1 changed files with 10 additions and 3 deletions
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13
Makefile
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@@ -12,10 +12,17 @@
# o Do not print "Entering directory ...";
MAKEFLAGS += -r --no-print-directory
# Readlink -f requires GNU readlink
ifeq ($(shell uname -s),Darwin)
READLINK ?= greadlink
else
READLINK ?= readlink
endif
# Find out source, build, and install directories
src_dir=$(CURDIR)
ifdef O
build_dir=$(shell readlink -f $(O))
build_dir=$(shell $(READLINK) -f $(O))
else
build_dir=$(CURDIR)/build
endif
@@ -23,7 +30,7 @@ ifeq ($(build_dir),$(CURDIR))
$(error Build directory is same as source directory.)
endif
ifdef I
install_dir=$(shell readlink -f $(I))
install_dir=$(shell $(READLINK) -f $(I))
else
install_dir=$(CURDIR)/install
endif
@@ -34,7 +41,7 @@ ifeq ($(install_dir),$(build_dir))
$(error Install directory is same as build directory.)
endif
ifdef PLATFORM_DIR
platform_dir_path=$(shell readlink -f $(PLATFORM_DIR))
platform_dir_path=$(shell $(READLINK) -f $(PLATFORM_DIR))
ifdef PLATFORM
platform_parent_dir=$(platform_dir_path)
else