Make build hermetic without shell scripts

- Fix some minor issues in ar.com
- Have execve() look for `ape` command
- Rewrite NT paths using /c/ rather /??/c:/
- Replace broken GCC symlinks with .sym files
- Rewrite $PATH environment variables on startup
- Make $(APE_NO_MODIFY_SELF) the default bootloader
- Add all build command dependencies to build/bootstrap
- Get the repository mostly building from source on non-Linux

build/definitions.mk

@@ -50,15 +50,42 @@ ARFLAGS = rcsD
 ZFLAGS ?=
 XARGS ?= xargs -P4 -rs8000
 DOT ?= dot
-GZ ?= gzip
 CLANG = clang
 FC = gfortran  #/opt/cross9f/bin/x86_64-linux-musl-gfortran
+TMPDIR = o/tmp
 
-# see build/compile, etc. which run third_party/gcc/unbundle.sh
 AR = build/bootstrap/ar.com
+CP = build/bootstrap/cp.com
+RM = build/bootstrap/rm.com -f
+ECHO = build/bootstrap/echo.com
+TOUCH = build/bootstrap/touch.com
 PKG = build/bootstrap/package.com
 MKDEPS = build/bootstrap/mkdeps.com
 ZIPOBJ = build/bootstrap/zipobj.com
+MKDIR = build/bootstrap/mkdir.com -p
+COMPILE = build/bootstrap/compile.com -V9 $(QUOTA)
+
+COMMA := ,
+PWD := $(shell build/bootstrap/pwd.com)
+IMAGE_BASE_VIRTUAL ?= 0x400000
+
+IGNORE := $(shell $(ECHO) -2 ♥cosmo)
+IGNORE := $(shell $(MKDIR) o/tmp)
+
+ifneq ("$(wildcard o/third_party/gcc/bin/x86_64-pc-linux-gnu-as.exe)","")
+AS = o/third_party/gcc/bin/x86_64-pc-linux-gnu-as.exe
+CC = o/third_party/gcc/bin/x86_64-pc-linux-gnu-gcc.exe
+CXX = o/third_party/gcc/bin/x86_64-pc-linux-gnu-g++.exe
+CXXFILT = o/third_party/gcc/bin/x86_64-pc-linux-gnu-c++filt.exe
+LD = o/third_party/gcc/bin/x86_64-pc-linux-gnu-ld.bfd.exe
+NM = o/third_party/gcc/bin/x86_64-pc-linux-gnu-nm.exe
+GCC = o/third_party/gcc/bin/x86_64-pc-linux-gnu-gcc.exe
+STRIP = o/third_party/gcc/bin/x86_64-pc-linux-gnu-strip.exe
+OBJCOPY = o/third_party/gcc/bin/x86_64-pc-linux-gnu-objcopy.exe
+OBJDUMP = o/third_party/gcc/bin/x86_64-pc-linux-gnu-objdump.exe
+ADDR2LINE = $(shell build/bootstrap/pwd.com)/o/third_party/gcc/bin/x86_64-pc-linux-gnu-addr2line.exe
+else
+IGNORE := $(shell build/bootstrap/unbundle.com)
 AS = o/third_party/gcc/bin/x86_64-linux-musl-as
 CC = o/third_party/gcc/bin/x86_64-linux-musl-gcc
 CXX = o/third_party/gcc/bin/x86_64-linux-musl-g++
@@ -69,18 +96,12 @@ GCC = o/third_party/gcc/bin/x86_64-linux-musl-gcc
 STRIP = o/third_party/gcc/bin/x86_64-linux-musl-strip
 OBJCOPY = o/third_party/gcc/bin/x86_64-linux-musl-objcopy
 OBJDUMP = o/third_party/gcc/bin/x86_64-linux-musl-objdump
-ADDR2LINE = $(shell pwd)/o/third_party/gcc/bin/x86_64-linux-musl-addr2line
-
-COMMA := ,
-PWD := $(shell pwd)
-IMAGE_BASE_VIRTUAL ?= 0x400000
-HELLO := $(shell build/hello)
-TMPDIR := $(shell build/findtmp)
-SPAWNER := $(shell build/getcompile) -V$(shell build/getccversion $(CC))
-COMPILE = $(SPAWNER) $(HARNESSFLAGS) $(QUOTA)
+ADDR2LINE = $(shell build/bootstrap/pwd.com)/o/third_party/gcc/bin/x86_64-linux-musl-addr2line
+endif
 
 export ADDR2LINE
 export LC_ALL
+export MKDIR
 export MODE
 export SOURCE_DATE_EPOCH
 export TMPDIR
@@ -115,7 +136,7 @@ TRADITIONAL =								\
 DEFAULT_CCFLAGS =							\
 	-Wall								\
 	-Werror								\
-	-fdebug-prefix-map="$(PWD)"=					\
+	-fdebug-prefix-map='$(PWD)'=					\
 	-frecord-gcc-switches
 
 DEFAULT_OFLAGS =							\
@@ -180,7 +201,7 @@ PYFLAGS =								\
 ASONLYFLAGS =								\
 	-c								\
 	-g								\
-	--debug-prefix-map="$(PWD)"=
+	--debug-prefix-map='$(PWD)'=
 
 DEFAULT_LDLIBS =
 

build/findtmp

@@ -1,17 +0,0 @@
-#!/bin/sh
-#-*-mode:sh;indent-tabs-mode:nil;tab-width:2;coding:utf-8-*-┐
-#───vi: set net ft=sh ts=2 sts=2 fenc=utf-8 :vi─────────────┘
-#
-# OVERVIEW
-#
-#   Temporary Directory Discovery
-#
-# DESCRIPTION
-#
-#   We call this script once per build to ideally find a folder that's
-#   backed by an in-memory file system. We then export it to the TMPDIR
-#   environment variable. Many programs use it under the hood, e.g. gcc,
-#   so it grants many small performance improvements.
-
-mkdir -p o/tmp
-echo $PWD/o/tmp

build/getccversion

@@ -1,39 +0,0 @@
-#!/bin/sh
-#-*-mode:sh;indent-tabs-mode:nil;tab-width:2;coding:utf-8-*-┐
-#───vi: set net ft=sh ts=2 sts=2 fenc=utf-8 :vi─────────────┘
-#
-# OVERVIEW
-#
-#   Compiler Version Discovery
-#
-# DESCRIPTION
-#
-#   Cosmopolitan itself may be built using either GCC and Clang, and our
-#   build irons out many of the differences between the two. This script
-#   is used by build/definitions.mk alongside build/getccname to support
-#   the different versions folks use.
-#
-#   Our aim is to support GCC 4.2.1+ since that's the last GPLv2 version
-#   with any sort of industry consensus. Please note, Cosmopolitan never
-#   links GCC runtimes when using later versions, so some concerns might
-#   not apply.
-
-if [ ! -d o/third_party/gcc ]; then
-  third_party/gcc/unbundle.sh
-fi
-
-set -e
-
-MAJOR_VERSION=$(
-  $1 --version |
-    head -n1 |
-    sed -n '
-        s!^[^(]*([^)]*) \([[:digit:]][[:digit:]]*\).*!\1!p
-        s!^.*clang.*version \([[:digit:]][[:digit:]]*\).*!\1!p
-      ')
-
-if [ -z "$MAJOR_VERSION" ]; then
-  echo 6
-else
-  printf '%s\n' "$MAJOR_VERSION"
-fi

build/getcompile

@@ -1,12 +0,0 @@
-#!/bin/sh
-#-*-mode:sh;indent-tabs-mode:nil;tab-width:2;coding:utf-8-*-┐
-#───vi: set net ft=sh ts=2 sts=2 fenc=utf-8 :vi─────────────┘
-
-if ! [ o/build/bootstrap/compile.com -nt build/bootstrap/compile.com ]; then
-  mkdir -p o/build/bootstrap/
-  cp -f build/bootstrap/compile.com o/build/bootstrap/compile.$$.com
-  o/build/bootstrap/compile.$$.com -n
-  mv -f o/build/bootstrap/compile.$$.com o/build/bootstrap/compile.com
-fi
-
-echo o/build/bootstrap/compile.com

build/hello

@@ -1,20 +0,0 @@
-#!/bin/sh
-#-*-mode:sh;indent-tabs-mode:nil;tab-width:2;coding:utf-8-*-┐
-#───vi: set net ft=sh ts=2 sts=2 fenc=utf-8 :vi─────────────┘
-#
-# SYNOPSIS
-#
-#   HELLO BUILD
-#
-# OVERVIEW
-#
-#   We generate a line at the start of each Makefile run, because if we
-#   use `make V=0` mode then the terminal logging trick we use in
-#   tool/build/compile.c will delete the previous line, and we'd rather
-#   have that line not be the bash prompt that ran make.
-#
-#   This script is also useful for giving us an indicator each time the
-#   build restarts itself from scratch, which can happen in cases like
-#   when dependencies need to be regenerated by tool/build/mkdeps.c
-
-echo ♥cosmo >&2

build/rules.mk

@@ -29,7 +29,6 @@ o/%.o: %.cc                        ; @$(COMPILE) -AOBJECTIFY.cxx $(OBJECTIFY.cxx
 o/%.o: o/%.cc                      ; @$(COMPILE) -AOBJECTIFY.cxx $(OBJECTIFY.cxx) $(OUTPUT_OPTION) $<
 o/%.lds: %.lds                     ; @$(COMPILE) -APREPROCESS $(PREPROCESS.lds) $(OUTPUT_OPTION) $<
 o/%.inc: %.h                       ; @$(COMPILE) -APREPROCESS $(PREPROCESS) $(OUTPUT_OPTION) -D__ASSEMBLER__ -P $<
-o/%.pkg:                           ; @$(COMPILE) -APACKAGE -T$@ $(PKG) $(OUTPUT_OPTION) $(addprefix -d,$(filter %.pkg,$^)) $(filter %.o,$^)
 o/%.h.ok: %.h                      ; @$(COMPILE) -ACHECK.h $(COMPILE.c) -xc -g0 -o $@ $<
 o/%.okk: %                         ; @$(COMPILE) -ACHECK.h $(COMPILE.cxx) -xc++ -g0 -o $@ $<
 o/%.greg.o: %.greg.c               ; @$(COMPILE) -AOBJECTIFY.greg $(OBJECTIFY.greg.c) $(OUTPUT_OPTION) $<
@@ -75,7 +74,6 @@ o/$(MODE)/%.ncabi.o: %.ncabi.c     ; @$(COMPILE) -AOBJECTIFY.nc $(OBJECTIFY.ncab
 o/$(MODE)/%.real.o: %.c            ; @$(COMPILE) -AOBJECTIFY.real $(OBJECTIFY.real.c) $(OUTPUT_OPTION) $<
 
 o/$(MODE)/%.runs: o/$(MODE)/%      ; @$(COMPILE) -ACHECK -tT$@ $< $(TESTARGS)
-o/$(MODE)/%.pkg:                   ; @$(COMPILE) -APACKAGE -T$@ $(PKG) $(OUTPUT_OPTION) $(addprefix -d,$(filter %.pkg,$^)) $(filter %.o,$^)
 o/$(MODE)/%.zip.o: %               ; @$(COMPILE) -AZIPOBJ $(ZIPOBJ) $(ZIPOBJ_FLAGS) $(OUTPUT_OPTION) $<
 o/$(MODE)/%-gcc.asm: %.c           ; @$(COMPILE) -AOBJECTIFY.c $(OBJECTIFY.c) -S -g0 $(OUTPUT_OPTION) $<
 o/$(MODE)/%-gcc.asm: %.cc          ; @$(COMPILE) -AOBJECTIFY.c $(OBJECTIFY.cxx) -S -g0 $(OUTPUT_OPTION) $<
@@ -87,6 +85,14 @@ o/%.a:
 	$(file >$@.args,$^)
 	@$(COMPILE) -AARCHIVE -T$@ $(AR) $(ARFLAGS) $@ @$@.args
 
+o/%.pkg:
+	$(file >$@.args,$(filter %.o,$^))
+	@$(COMPILE) -APACKAGE -T$@ $(PKG) $(OUTPUT_OPTION) $(addprefix -d,$(filter %.pkg,$^)) @$@.args
+
+o/$(MODE)/%.pkg:
+	$(file >$@.args,$(filter %.o,$^))
+	@$(COMPILE) -APACKAGE -T$@ $(PKG) $(OUTPUT_OPTION) $(addprefix -d,$(filter %.pkg,$^)) @$@.args
+
 o/$(MODE)/%.o: %.py o/$(MODE)/third_party/python/pyobj.com
 	@$(COMPILE) -APYOBJ o/$(MODE)/third_party/python/pyobj.com $(PYFLAGS) -o $@ $<