Fix passing -j NNN to gmake

Use a more restrictive pattern to extract -j NNN from MAKEFLAGS
into GMAKE_J_ARGS, to avoid false positives when the source directory
has "-j" in the path (e.g "amd64-job

Fix passing -j NNN to gmake

Use a more restrictive pattern to extract -j NNN from MAKEFLAGS
into GMAKE_J_ARGS, to avoid false positives when the source directory
has "-j" in the path (e.g "amd64-job-000012" or "src-j9999").
Previously this could pass either -"-j" or "-j BIGNUM" to gmake
and result in "vfork: Resource temporarily unavailable" failures.

PR misc/54456

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tools: if MAKEVERBOSE >=2, noisy automake builds

Explicitly build with V=1 for MAKEVERBOSE >= 2
so that Makefile.gnuhost (automake) consumers
are more consistent with native builds.

(If the upstrea

tools: if MAKEVERBOSE >=2, noisy automake builds

Explicitly build with V=1 for MAKEVERBOSE >= 2
so that Makefile.gnuhost (automake) consumers
are more consistent with native builds.

(If the upstream is using AM_SILENT_RULES(yes)
then the default is V=0).

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tools: in non-verbose mode, build the tools silently

tools: configure --silent if MAKEVERBOSE == 0

tools: if MAKEVERBOSE < 2, quieten automake builds

Adjust whitespace to look more like assignment than comparison. NFC

detect clang instead of bundling it with Darwin

Add FLEX to the configure env, from Lloyd Parkes on tech-toolchain.
Some configure scripts seem to need both LEX and FLEX.

Remove hack previously needed to build gcc/arm with clang.
genattrtab.c:1.2 makes this unnecessary.

Tested by thorpej.

Use the __clang__ preprocessor symbol to check for clang, since --version
might barf. From joerg@

do the bracket nesting only for clang for now.

GCC build exceeds the macOS clang default bracket nesting level of 256.
Work around with -fbracket-depth=512.

From potr in PR toolchain/53178.

look in gpl3 for stuff too (autoconf)

look in external first.

pass HOST_SH to the build, to keep it from picking up a "bash"
from $PATH

Revert previous change to tools/Makefile.gnuhost. When getenv("M4")
contains multiple words, flex fails.

Adjust tools/autoconf/Makefile to pass the necessary extra arguments via
M4=... in CONFIGURE

Revert previous change to tools/Makefile.gnuhost. When getenv("M4")
contains multiple words, flex fails.

Adjust tools/autoconf/Makefile to pass the necessary extra arguments via
M4=... in CONFIGURE_ENV. This is similar to what used to be in
revision 1.4 of tools/autoconf/Makefile, but it's now after instead of
before the inclusion of Makefile.gnuhost, because it has to override the
value of M4=... that Makefile.gnuhost stores in CONFIGURE_ENV.

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Add the "-g -D__gnu__" flags when invoking M4 via CONFIGURE_ARGS
in tools/Makefile.gnuhost. This makes the tools version of m4
behave like GNU m4.

Remove similar code from tools/autoconf/Makefile,

Add the "-g -D__gnu__" flags when invoking M4 via CONFIGURE_ARGS
in tools/Makefile.gnuhost. This makes the tools version of m4
behave like GNU m4.

Remove similar code from tools/autoconf/Makefile, where it didn't
work because Makefile.gnuhost would previously have overridden it.

This fixes a problem in which the tools version of autoconf complained
"M4sugar requires GNU M4.
Install it before installing M4sugar or set the M4 environment variable to its path name."

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Don't use -print0/-0 in find | xargs, it is non-standard and not needed at all.

Replace not only space but also '(' and ')' on generating BUILD_PLATFORM
strings to appease shell's echo.
Cygwin's uname -r returns "1.7.9(0.237/5/3)" etc.

remove dup target.

Merge the two Makefiles that were mostly copies of each others.
The reason to do this was to add support for cleaning up the config.cache
files when the build environment (as determined by uname -srm

Merge the two Makefiles that were mostly copies of each others.
The reason to do this was to add support for cleaning up the config.cache
files when the build environment (as determined by uname -srm) changes.

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Pass M4=${TOOL_M4:Q} to CONFIGURE_ENV for tools/gmp.
Fixes configure error on cygwin.

Actually use timestamp file's timestamps so that things rebuild correctly.

Use ${TOOL_AWK} instead of ${AWK} or plain "awk" in make commands.
Pass AWK=${TOOL_AWK:Q} to shell scripts that use awk.

Put back @ on configure line. Was off for debugging and shouldn't have been
committed.