INSTALL: Always set PLAN9_TARGET environment variable That is, not only when -r was given. This allows using this veriable in mkfiles across the code base.

INSTALL: build arm64 binaries on arm64 Macs If there is any x86 binary in the chain of parent processes from the current one, then uname -m prints x86_64 and clang defaults to building x86_64 binaries. Detect arm64 using the kernel version and force building an arm64 toolchain instead of perpetuating x86. This is particularly important when the user shell is rc, which has been built for x86, because then rebuilding under rc continues to use x86.

all: remove $OBJTYPE from build Now that we assume pthreads, the only assembly left is in libmp and libsec. We only ever added assembly for 386. The portable C code is fine for plan9port.

INSTALL: build mk all the time If mk gets into a bad state, it's not obvious that you can remove the binary to force the rebuild. Also, not rebuilding means that bugs in mkmk.sh are not noticed. Just rebuild from scratch every time. It doesn't take too long compared to the rest of INSTALL.

all: remove Linux 2.4 vs 2.6 detection Linux 2.4 is dead. (The libthread code hasn't worked for Linux 2.4 for a long time.)

INSTALL: do not rm config after setting it up Fixes #334.

INSTALL, 9c, 9l: improve handling of *BSD (#302)

INSTALL: use cc to check for fontsrv on non-Darwin (#203) FreeBSD 11.2 by default does not have gcc.

INSTALL: set $NPROC on macOS My MacBook Pro has hw.ncpu=12, so set NPROC=12. Speeds up INSTALL dramatically. Should probably add similar code to other OSes. Also silence rio warning from earlier commit.

INSTALL: set CC9 on macOS to use xcrun clang Using plain 'clang' does not work well for the new devdraw on macOS 10.14. But 'xcrun --sdk macosx clang' does work, for reasons no one understands. Hopefully this will be OK on all macOS systems.

INSTALL: fix compiler detection on FreeBSD+clang (#177)

all: update site from swtch.com to 9fans.github.io

INSTALL: append /usr/X11R6/include and /usr/X11R6/include/freetype2 to X11 headers detection, so that enable fontsrv build on OpenBSD. Change-Id: I2f3f766339a9f8beed647dfbb19a588d1825732a Reviewed-on: https://plan9port-review.googlesource.com/1290 Reviewed-by: Russ Cox <rsc@google.com>

INSTALL: fix path of quote1 and quote2 Thanks to Akshat Kumar for reporting this issue. LGTM=seed, rsc R=rsc, seed https://codereview.appspot.com/173770043

build: rename " and "" to quote1 and quote2 for hg They'll be copied back during installation but then hg doesn't have to create those files on systems that have trouble with them. TBR=rsc https://codereview.appspot.com/105800043