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| author | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2016-12-31 23:34:04 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2016-12-31 23:49:24 +0530 |
| commit | 6765d5d34d126b26d55e2d73dac4dfec5e6d6241 (patch) | |
| tree | 4f8c8aebebd366900e8657a91158771e2cf5e058 /elf/Makefile | |
| parent | 9dd409a5f4a7a053cc962f8371dad0fe5cc22597 (diff) | |
| download | glibc-6765d5d34d126b26d55e2d73dac4dfec5e6d6241.tar.gz | |
Enhance --enable-tunables to select tunables frontend at build time
At the GNU Tools Cauldron 2016, the state of the current tunables
patchset was considered OK with the addition of a way to select the
frontend to be used for the tunables. That is, to avoid being locked
in to one type of frontend initially, it should be possible to build
tunables with a different frontend with something as simple as a
configure switch.
To that effect, this patch enhances the --enable-tunables option to
accept more values than just 'yes' or 'no'. The current frontend (and
default when enable-tunables is 'yes') is called 'valstring', to
select the frontend where a single environment variable is set to a
colon-separated value string. More such frontends can be added in
future.
* Makeconfig (have-tunables): Check for non-negative instead
of positive.
* configure.ac: Add 'valstring' as a valid value for
--enable-tunables.
* configure: Regenerate.
* elf/Makefile (have-tunables): Check for non-negative instead
of positive.
(CPPFLAGS-dl-tunables.c): Define TUNABLES_FRONTEND for
dl-tunables.c.
* elf/dl-tunables.c (GLIBC_TUNABLES): Define only when
TUNABLES_FRONTEND == TUNABLES_FRONTEND_valstring.
(tunables_strdup): Likewise.
(disable_tunables): Likewise.
(parse_tunables): Likewise.
(__tunables_init): Process GLIBC_TUNABLES envvar only when.
TUNABLES_FRONTEND == TUNABLES_FRONTEND_valstring.
* elf/dl-tunables.h (TUNABLES_FRONTEND_valstring): New macro.
(TUNABLES_FRONTEND_yes): New macro, define as
TUNABLES_FRONTEND_valstring by default.
* manual/install.texi: Document new acceptable values for
--enable-tunables.
* INSTALL: Regenerate.
Diffstat (limited to 'elf/Makefile')
| -rw-r--r-- | elf/Makefile | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/elf/Makefile b/elf/Makefile index 3cda2c9db8..c3636a64d2 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -36,8 +36,10 @@ ifeq (yes,$(use-ldconfig)) dl-routines += dl-cache endif -ifeq (yes,$(have-tunables)) +ifneq (no,$(have-tunables)) dl-routines += dl-tunables +tunables-type = $(addprefix TUNABLES_FRONTEND_,$(have-tunables)) +CPPFLAGS-dl-tunables.c = -DTUNABLES_FRONTEND=$(tunables-type) # Make sure that the compiler does not insert any library calls in tunables # code paths. |