Support building cosmocc on MacOS (#1365)

This updates the cosmocc toolchain packaging script to work on MacOS. It
has been tested on GitHub Actions macos-13 (x86_64) and macos-14 (arm64)
runners, and is verified to still work on Ubuntu (GitHub Actions runners
ubuntu-24.04 and ubuntu-24.04-arm). It'll help bring cosmocc to MacPorts
by running the packaging script. We favor `gmake` rather than the `make`
command because it distinguishes GNU Make from BSD Make, and Xcode Make.
Additionally, APE loader from the bootstrapper toolchain is used instead
of a system APE, which may not be available.

tool/cosmocc/package.sh

@@ -15,17 +15,49 @@ mode() {
   esac
 }
 
+_nproc() {
+  case $(uname -s) in
+    Darwin) sysctl -n hw.logicalcpu ;;
+    *)      nproc                   ;;
+  esac
+}
+
+TMPDIR=${TMPDIR:-/tmp}
 OUTDIR=${1:-cosmocc}
 APELINK=o/$(mode)/tool/build/apelink
 AMD64=${2:-x86_64}
 ARM64=${3:-aarch64}
-NPROC=$(($(nproc)/2))
+NPROC=$(($(_nproc)/2))
 GCCVER=14.1.0
 
-make -j$NPROC m= \
+if ! MAKE=$(command -v gmake); then
+  if ! MAKE=$(command -v make); then
+    echo please install gnu make >&2
+    exit 1
+  fi
+fi
+
+$MAKE -j$NPROC m= \
   $APELINK
 
-make -j$NPROC m=$AMD64 \
+if ! APE=$(command -v ape); then
+  case $(uname -s) in
+    Darwin)
+      case $(mode) in
+        aarch64)
+          cc -O -o "$TMPDIR/ape.$$" .cosmocc/current/bin/ape-m1.c || exit
+          trap 'rm "$TMPDIR/ape.$$"' EXIT
+          APE=$TMPDIR/ape.$$
+        ;;
+        *) APE=.cosmocc/current/bin/ape-x86_64.macho ;;
+      esac
+      ;;
+    *) APE=.cosmocc/current/bin/ape-$(uname -m).elf ;;
+  esac
+fi
+stat $APE
+
+$MAKE -j$NPROC m=$AMD64 \
   o/cosmocc.h.txt \
   o/$AMD64/ape/ape.lds \
   o/$AMD64/libc/crt/crt.o \
@@ -62,7 +94,7 @@ make -j$NPROC m=$AMD64 \
   o/$AMD64/third_party/make/make.dbg \
   o/$AMD64/third_party/ctags/ctags.dbg
 
-make -j$NPROC m=$AMD64-tiny \
+$MAKE -j$NPROC m=$AMD64-tiny \
   o/cosmocc.h.txt \
   o/$AMD64-tiny/ape/ape.lds \
   o/$AMD64-tiny/libc/crt/crt.o \
@@ -74,7 +106,7 @@ make -j$NPROC m=$AMD64-tiny \
   o/$AMD64-tiny/cosmopolitan.a \
   o/$AMD64-tiny/third_party/libcxx/libcxx.a \
 
-make -j$NPROC m=$AMD64-dbg \
+$MAKE -j$NPROC m=$AMD64-dbg \
   o/cosmocc.h.txt \
   o/$AMD64-dbg/ape/ape.lds \
   o/$AMD64-dbg/libc/crt/crt.o \
@@ -86,7 +118,7 @@ make -j$NPROC m=$AMD64-dbg \
   o/$AMD64-dbg/cosmopolitan.a \
   o/$AMD64-dbg/third_party/libcxx/libcxx.a \
 
-make CONFIG_TARGET_ARCH= -j$NPROC m=$AMD64-optlinux \
+$MAKE CONFIG_TARGET_ARCH= -j$NPROC m=$AMD64-optlinux \
   o/cosmocc.h.txt \
   o/$AMD64-optlinux/ape/ape.lds \
   o/$AMD64-optlinux/libc/crt/crt.o \
@@ -98,7 +130,7 @@ make CONFIG_TARGET_ARCH= -j$NPROC m=$AMD64-optlinux \
   o/$AMD64-optlinux/cosmopolitan.a \
   o/$AMD64-optlinux/third_party/libcxx/libcxx.a \
 
-make -j$NPROC m=$ARM64 \
+$MAKE -j$NPROC m=$ARM64 \
   o/$ARM64/ape/ape.elf \
   o/$ARM64/ape/aarch64.lds \
   o/$ARM64/libc/crt/crt.o \
@@ -130,21 +162,21 @@ make -j$NPROC m=$ARM64 \
   o/$ARM64/third_party/make/make.dbg \
   o/$ARM64/third_party/ctags/ctags.dbg
 
-make -j$NPROC m=$ARM64-tiny \
+$MAKE -j$NPROC m=$ARM64-tiny \
   o/$ARM64-tiny/ape/ape.elf \
   o/$ARM64-tiny/ape/aarch64.lds \
   o/$ARM64-tiny/libc/crt/crt.o \
   o/$ARM64-tiny/cosmopolitan.a \
   o/$ARM64-tiny/third_party/libcxx/libcxx.a \
 
-make -j$NPROC m=$ARM64-dbg \
+$MAKE -j$NPROC m=$ARM64-dbg \
   o/$ARM64-dbg/ape/ape.elf \
   o/$ARM64-dbg/ape/aarch64.lds \
   o/$ARM64-dbg/libc/crt/crt.o \
   o/$ARM64-dbg/cosmopolitan.a \
   o/$ARM64-dbg/third_party/libcxx/libcxx.a \
 
-make -j$NPROC m=$ARM64-optlinux \
+$MAKE -j$NPROC m=$ARM64-optlinux \
   o/$ARM64-optlinux/ape/ape.elf \
   o/$ARM64-optlinux/ape/aarch64.lds \
   o/$ARM64-optlinux/libc/crt/crt.o \
@@ -272,7 +304,7 @@ cp -f o/$ARM64/ape/ape.elf "$OUTDIR/bin/ape-aarch64.elf"
 for x in assimilate march-native mktemper fixupobj zipcopy apelink pecheck mkdeps zipobj \
          ar chmod cocmd cp echo gzip objbincopy package rm touch mkdir compile sha256sum \
          resymbol; do
-  ape $APELINK \
+  $APE $APELINK \
     -l o/$AMD64/ape/ape.elf \
     -l o/$ARM64/ape/ape.elf \
     -M ape/ape-m1.c \
@@ -286,7 +318,7 @@ for x in ar chmod cp echo gzip package rm touch mkdir compile sha256sum; do
 done
 
 for x in make ctags; do
-  ape $APELINK \
+  $APE $APELINK \
     -l o/$AMD64/ape/ape.elf \
     -l o/$ARM64/ape/ape.elf \
     -M ape/ape-m1.c \