build: Misc portability improvements

GNUmakefile.in

@@ -51,26 +51,62 @@ ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_CC) ; ), )
 override LIMINE_CC := $(CC)
 endif
 ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_LD) ; ), )
+override LIMINE_LD := gld
+ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_LD) ; ), )
 override LIMINE_LD := ld.bfd
 ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_LD) ; ), )
+override LIMINE_LD := /usr/local/bin/ld
+ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_LD) ; ), )
 override LIMINE_LD := ld
 endif
 endif
+endif
+endif
+ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_AR) ; ), )
+override LIMINE_AR := gar
+ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_AR) ; ), )
+override LIMINE_AR := /usr/local/bin/ar
 ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_AR) ; ), )
 override LIMINE_AR := ar
 endif
+endif
+endif
+ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_AS) ; ), )
+override LIMINE_AS := gas
+ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_AS) ; ), )
+override LIMINE_AS := /usr/local/bin/as
 ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_AS) ; ), )
 override LIMINE_AS := as
 endif
+endif
+endif
+ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_OBJCOPY) ; ), )
+override LIMINE_OBJCOPY := gobjcopy
+ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_OBJCOPY) ; ), )
+override LIMINE_OBJCOPY := /usr/local/bin/objcopy
 ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_OBJCOPY) ; ), )
 override LIMINE_OBJCOPY := objcopy
 endif
+endif
+endif
+ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_OBJDUMP) ; ), )
+override LIMINE_OBJDUMP := gobjdump
+ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_OBJDUMP) ; ), )
+override LIMINE_OBJDUMP := /usr/local/bin/objdump
 ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_OBJDUMP) ; ), )
 override LIMINE_OBJDUMP := objdump
 endif
+endif
+endif
+ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_READELF) ; ), )
+override LIMINE_READELF := greadelf
+ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_READELF) ; ), )
+override LIMINE_READELF := /usr/local/bin/readelf
 ifeq ($(shell PATH='$(call SHESCAPE,$(PATH))' command -v $(LIMINE_READELF) ; ), )
 override LIMINE_READELF := readelf
 endif
+endif
+endif
 
 export LIMINE_CC
 export LIMINE_LD
@@ -101,16 +137,36 @@ ifneq ($(MAKECMDGOALS), install)
 ifneq ($(MAKECMDGOALS), install-data)
 ifneq ($(MAKECMDGOALS), install-strip)
 
-override USING_GNU_LD := $(shell PATH='$(call SHESCAPE,$(PATH))' $(LIMINE_LD) --version | grep Binutils >/dev/null && echo 1)
+override USING_GNU_LD := $(shell PATH='$(call SHESCAPE,$(PATH))' $(LIMINE_LD) --version | grep 'GNU Binutils' >/dev/null && echo 1)
 ifneq ($(USING_GNU_LD), 1)
 $(error The specified LIMINE_LD linker ($(LIMINE_LD)) is not the GNU linker)
 endif
 
-override USING_GNU_OBJCOPY := $(shell PATH='$(call SHESCAPE,$(PATH))' $(LIMINE_OBJCOPY) --version | grep Binutils >/dev/null && echo 1)
+override USING_GNU_AR := $(shell PATH='$(call SHESCAPE,$(PATH))' $(LIMINE_AR) --version | grep 'GNU Binutils' >/dev/null && echo 1)
+ifneq ($(USING_GNU_AR), 1)
+$(error The specified LIMINE_AR archiver ($(LIMINE_AR)) is not the GNU archiver)
+endif
+
+override USING_GNU_AS := $(shell PATH='$(call SHESCAPE,$(PATH))' $(LIMINE_AS) --version | grep 'GNU Binutils' >/dev/null && echo 1)
+ifneq ($(USING_GNU_AS), 1)
+$(error The specified LIMINE_AS assembler ($(LIMINE_AS)) is not the GNU assembler)
+endif
+
+override USING_GNU_OBJCOPY := $(shell PATH='$(call SHESCAPE,$(PATH))' $(LIMINE_OBJCOPY) --version | grep 'GNU Binutils' >/dev/null && echo 1)
 ifneq ($(USING_GNU_OBJCOPY), 1)
 $(error The specified LIMINE_OBJCOPY ($(LIMINE_OBJCOPY)) is not GNU objcopy)
 endif
 
+override USING_GNU_OBJDUMP := $(shell PATH='$(call SHESCAPE,$(PATH))' $(LIMINE_OBJDUMP) --version | grep 'GNU Binutils' >/dev/null && echo 1)
+ifneq ($(USING_GNU_OBJDUMP), 1)
+$(error The specified LIMINE_OBJDUMP ($(LIMINE_OBJDUMP)) is not GNU objdump)
+endif
+
+override USING_GNU_READELF := $(shell PATH='$(call SHESCAPE,$(PATH))' $(LIMINE_READELF) --version | grep 'GNU Binutils' >/dev/null && echo 1)
+ifneq ($(USING_GNU_READELF), 1)
+$(error The specified LIMINE_READELF ($(LIMINE_READELF)) is not GNU readelf)
+endif
+
 ifneq ($(CC_MACHINE), x86_64)
 ifneq ($(CC_MACHINE), amd64-)
 $(error No suitable x86_64 C compiler found, please install an x86_64 C toolchain or run "./make_toolchain.sh")
@@ -132,7 +188,7 @@ ifeq ($(USING_CLANG), 1)
 override LIMINE_CC := $(ORIG_LIMINE_CC)
 endif
 
-override STAGE1_FILES := $(shell find -L '$(call SHESCAPE,$(SRCDIR))/stage1' -type f -name '*.asm')
+override STAGE1_FILES := $(shell find '$(call SHESCAPE,$(SRCDIR))/stage1' -type f -name '*.asm')
 
 .PHONY: all
 all: limine-uefi limine-bios

README.md

@@ -72,7 +72,7 @@ This step can take a long time, but it will ensure that the toolchain will work
 with Limine. If on an x86_64 host, with GCC or Clang installed, you can skip to
 the next paragraph in order to use the system's toolchain instead.
 
-The toolchain's build process depends on the following packages: `GNU make`,
+The toolchain's build process depends on the following packages: `GNU make`, `GNU tar`,
 `curl`, `gzip`, `bzip2`, `gcc/clang`, `g++/clang++`.
 
 Building the toolchain can be accomplished by running:
@@ -91,8 +91,8 @@ paragraph, or `gcc` or `llvm/clang` must also be installed, alongside
 
 ### Configure
 
-If checking out from the repository, run `./autogen.sh`, else, if using a
+If checking out from the repository, run `./autogen.sh` (GNU autoconf required),
-release tarball, run `./configure` directly.
+else, if using a release tarball, run `./configure` directly.
 
 Both `./autogen.sh` and `./configure` take arguments and environment variables;
 for more information on these, run `./configure --help`.
@@ -119,7 +119,7 @@ release directory just fine. This step will only install them to a `share` and
 
 To install Limine, run:
 ```bash
-make install
+make install    # (or gmake where applicable)
 ```
 
 ## How to use

autogen.sh

@@ -2,7 +2,9 @@
 
 set -ex
 
-srcdir="$(realpath $(dirname "$0"))"
+origdir="$(pwd -P)"
+
+srcdir="$(dirname "$0")"
 test -z "$srcdir" && srcdir=.
 
 cd "$srcdir"
@@ -12,6 +14,8 @@ cd "$srcdir"
 
 autoconf
 
+cd "$origdir"
+
 if test -z "$NOCONFIGURE"; then
     exec "$srcdir"/configure "$@"
 fi

decompressor/GNUmakefile

@@ -47,8 +47,8 @@ override INTERNAL_LDFLAGS := \
 	-static \
 	-Tlinker.ld
 
-override C_FILES := $(shell find -L ./ -type f -name '*.c')
+override C_FILES := $(shell find ./ -type f -name '*.c')
-override ASM_FILES := $(shell find -L ./ -type f -name '*.asm')
+override ASM_FILES := $(shell find ./ -type f -name '*.asm')
 override OBJ := $(addprefix $(call MKESCAPE,$(BUILDDIR))/, $(ASM_FILES:.asm=.o) $(C_FILES:.c=.o))
 override HEADER_DEPS := $(addprefix $(call MKESCAPE,$(BUILDDIR))/, $(C_FILES:.c=.d))
 

make_toolchain.sh

@@ -2,7 +2,7 @@
 
 set -ex
 
-srcdir="$(realpath $(dirname "$0"))"
+srcdir="$(dirname "$0")"
 test -z "$srcdir" && srcdir=.
 
 cd "$srcdir"
@@ -17,6 +17,12 @@ else
     export MAKE=make
 fi
 
+if command -v gtar; then
+    export TAR=gtar
+else
+    export TAR=tar
+fi
+
 export CFLAGS="-O2 -pipe"
 
 unset CC
@@ -30,9 +36,9 @@ if [ "$(uname)" = "OpenBSD" ]; then
 fi
 
 mkdir -p toolchain && cd toolchain
-PREFIX="$(pwd)"
+PREFIX="$(pwd -P)"
 
-export MAKEFLAGS="-j$(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || echo 1)"
+export MAKEFLAGS="-j$(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || psrinfo -tc 2>/dev/null || echo 1)"
 
 export PATH="$PREFIX/bin:$PATH"
 
@@ -47,8 +53,8 @@ rm -rf build
 mkdir build
 cd build
 
-tar -zxf ../binutils-$BINUTILSVERSION.tar.gz
+$TAR -zxf ../binutils-$BINUTILSVERSION.tar.gz
-tar -zxf ../gcc-$GCCVERSION.tar.gz
+$TAR -zxf ../gcc-$GCCVERSION.tar.gz
 
 mkdir build-binutils
 cd build-binutils
@@ -58,7 +64,11 @@ $MAKE install
 cd ..
 
 cd gcc-$GCCVERSION
-contrib/download_prerequisites
+sed 's|http://gcc.gnu|https://gcc.gnu|g' < contrib/download_prerequisites > dp.sed
+mv dp.sed contrib/download_prerequisites
+chmod +x contrib/download_prerequisites
+rm dp.sed
+contrib/download_prerequisites --no-verify
 cd ..
 mkdir build-gcc
 cd build-gcc

stage23/GNUmakefile

@@ -2,7 +2,7 @@ TARGET ?=
 BUILDDIR ?=
 USING_CLANG ?= 0
 
-override SRCDIR := $(shell pwd)
+override SRCDIR := $(shell pwd -P)
 
 override SPACE := $(subst ,, )
 
@@ -150,22 +150,22 @@ endif
 
 .PHONY: all clean
 
-override C_FILES := $(shell find -L ./ -type f -name '*.c')
+override C_FILES := $(shell find ./ -type f -name '*.c')
 ifeq ($(TARGET), bios)
-override ASM32_FILES := $(shell find -L ./ -type f -name '*.asm32')
+override ASM32_FILES := $(shell find ./ -type f -name '*.asm32')
-override ASMB_FILES := $(shell find -L ./ -type f -name '*.asmb')
+override ASMB_FILES := $(shell find ./ -type f -name '*.asmb')
 
 override OBJ := $(addprefix $(call MKESCAPE,$(BUILDDIR))/, $(ASM32_FILES:.asm32=.o) $(ASMB_FILES:.asmb=.o) $(C_FILES:.c=.o))
 endif
 ifeq ($(TARGET), uefi64)
-override ASM64_FILES := $(shell find -L ./ -type f -name '*.asm64')
+override ASM64_FILES := $(shell find ./ -type f -name '*.asm64')
-override ASM64U_FILES := $(shell find -L ./ -type f -name '*.asm64u')
+override ASM64U_FILES := $(shell find ./ -type f -name '*.asm64u')
 
 override OBJ := $(addprefix $(call MKESCAPE,$(BUILDDIR))/, $(ASM64_FILES:.asm64=.o) $(ASM64U_FILES:.asm64u=.o) $(C_FILES:.c=.o))
 endif
 ifeq ($(TARGET), uefi32)
-override ASM32_FILES := $(shell find -L ./ -type f -name '*.asm32')
+override ASM32_FILES := $(shell find ./ -type f -name '*.asm32')
-override ASM32U_FILES := $(shell find -L ./ -type f -name '*.asm32u')
+override ASM32U_FILES := $(shell find ./ -type f -name '*.asm32u')
 
 override OBJ := $(addprefix $(call MKESCAPE,$(BUILDDIR))/, $(ASM32_FILES:.asm32=.o) $(ASM32U_FILES:.asm32u=.o) $(C_FILES:.c=.o))
 endif