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* [gcc(refs/users/marxin/heads/backport-12)] lto: support --jobserver-style=fifo for recent GNU make
@ 2022-12-09 9:33 Martin Liska
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From: Martin Liska @ 2022-12-09 9:33 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:35c4567b37af5625526c47034fdb5efc65af3295
commit 35c4567b37af5625526c47034fdb5efc65af3295
Author: Martin Liska <mliska@suse.cz>
Date: Tue Aug 9 13:59:36 2022 +0200
lto: support --jobserver-style=fifo for recent GNU make
gcc/ChangeLog:
* opts-jobserver.h: Add one member.
* opts-common.cc (jobserver_info::jobserver_info): Parse FIFO
format of --jobserver-auth.
(cherry picked from commit 53e3b2bf16a486c15c20991c6095f7be09012b55)
Diff:
---
gcc/opts-common.cc | 17 +++++++++++++++--
gcc/opts-jobserver.h | 2 ++
2 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/gcc/opts-common.cc b/gcc/opts-common.cc
index 8a4d32de3e5..7c07d504696 100644
--- a/gcc/opts-common.cc
+++ b/gcc/opts-common.cc
@@ -2008,8 +2008,14 @@ void prepend_xassembler_to_collect_as_options (const char *collect_as_options,
jobserver_info::jobserver_info ()
{
+ /* Traditionally, GNU make uses opened pipes for jobserver-auth,
+ e.g. --jobserver-auth=3,4.
+ Starting with GNU make 4.4, one can use --jobserver-style=fifo
+ and then named pipe is used: --jobserver-auth=fifo:/tmp/hcsparta. */
+
/* Detect jobserver and drop it if it's not working. */
string js_needle = "--jobserver-auth=";
+ string fifo_prefix = "fifo:";
const char *envval = getenv ("MAKEFLAGS");
if (envval != NULL)
@@ -2018,8 +2024,15 @@ jobserver_info::jobserver_info ()
size_t n = makeflags.rfind (js_needle);
if (n != string::npos)
{
- if (sscanf (makeflags.c_str () + n + js_needle.size (),
- "%d,%d", &rfd, &wfd) == 2
+ string ending = makeflags.substr (n + js_needle.size ());
+ if (ending.find (fifo_prefix) == 0)
+ {
+ ending = ending.substr (fifo_prefix.size ());
+ pipe_path = ending.substr (0, ending.find (' '));
+ is_active = true;
+ }
+ else if (sscanf (makeflags.c_str () + n + js_needle.size (),
+ "%d,%d", &rfd, &wfd) == 2
&& rfd > 0
&& wfd > 0
&& is_valid_fd (rfd)
diff --git a/gcc/opts-jobserver.h b/gcc/opts-jobserver.h
index 68ce188b84a..98ea2579962 100644
--- a/gcc/opts-jobserver.h
+++ b/gcc/opts-jobserver.h
@@ -37,6 +37,8 @@ struct jobserver_info
int rfd = -1;
/* File descriptor for writing used for jobserver communication. */
int wfd = -1;
+ /* Named pipe path. */
+ string pipe_path = "";
/* Return true if jobserver is active. */
bool is_active = false;
};
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