d284b82b3e
This doesn't have much effect on the final build, because we link libbasic.a
into libsystemd-shared.so, so in the end, all the object built from basic/
end up in libsystemd-shared. And when the static library is linked into binaries,
any objects that are included in it but are not used are trimmed. Hence, the
size of output artifacts doesn't change:
$ du -sb /var/tmp/inst*
54181861 /var/tmp/inst1 (old)
54207441 /var/tmp/inst1s (old split-usr)
54182477 /var/tmp/inst2 (new)
54208041 /var/tmp/inst2s (new split-usr)
(The negligible change in size is because libsystemd-shared.so is bigger
by a few hundred bytes. I guess it's because symbols are named differently
or something like that.)
The effect is on the build process, in particular partial builds. This change
effectively moves the requirements on some build steps toward the leaves of the
dependency tree. Two effects:
- when building items that do not depend on libsystemd-shared, we
build less stuff for libbasic.a (which wouldn't be used anyway,
so it's a net win).
- when building items that do depend on libshared, we reduce libbasic.a as a
synchronization point, possibly allowing better parallelism.
Method:
1. copy list of .h files from src/basic/meson.build to /tmp/basic
2. $ for i in $(grep '.h$' /tmp/basic); do echo $i; git --no-pager grep "include \"$i\"" src/basic/ 'src/lib*' 'src/nss-*' 'src/journal/sd-journal.c' |grep -v "${i%.h}.c";echo ;done | less
20 lines
796 B
C
20 lines
796 B
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#pragma once
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#include <stdio.h>
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#include "fileio.h"
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/* These functions are split out of fileio.h (and not for examplement just as flags to the functions they wrap) in
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* order to optimize linking: This way, -lselinux is needed only for the callers of these functions that need selinux,
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* but not for all */
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int write_string_file_atomic_label_ts(const char *fn, const char *line, struct timespec *ts);
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static inline int write_string_file_atomic_label(const char *fn, const char *line) {
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return write_string_file_atomic_label_ts(fn, line, NULL);
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}
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int write_env_file_label(const char *fname, char **l);
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int fopen_temporary_label(const char *target, const char *path, FILE **f, char **temp_path);
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int create_shutdown_run_nologin_or_warn(void);
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