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| author | Peter Damianov <peter0x44@disroot.org> | 2024-04-28 16:16:11 -0700 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2024-05-02 12:42:33 +0200 |
| commit | 985b5a90f70c7376c771317c6c8c3bc5ef05e227 (patch) | |
| tree | ff83cb4fcf3dad9e3cf663ee1977aec3fa4c9047 /gcc | |
| parent | 5eb25d1561dd22316331feee92164f97ca79d1c3 (diff) | |
| download | gcc-985b5a90f70c7376c771317c6c8c3bc5ef05e227.zip gcc-985b5a90f70c7376c771317c6c8c3bc5ef05e227.tar.gz gcc-985b5a90f70c7376c771317c6c8c3bc5ef05e227.tar.bz2 | |
Driver: Add new -truncate option
This commit adds a new option to the driver that truncates one file after
linking.
Tested likeso:
$ gcc hello.c -c
$ du -h hello.o
4.0K hello.o
$ gcc hello.o -truncate hello.o
$ ./a.out
Hello world
$ du -h hello.o
$ 0 hello.o
$ gcc hello.o -truncate
gcc: error: missing filename after '-truncate'
The motivation for adding this is PR110710. It is used by lto-wrapper to
truncate files in a shell-independent manner.
Signed-off-by: Peter Damianov <peter0x44@disroot.org>
PR lto/110710
* common.opt (truncate): New internal option.
* gcc.cc (totruncate_file): New global.
(driver_handle_option): Handle -truncate <file>.
(driver::final_actions): Truncate the file indicated.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/common.opt | 6 | ||||
| -rw-r--r-- | gcc/gcc.cc | 14 |
2 files changed, 20 insertions, 0 deletions
diff --git a/gcc/common.opt b/gcc/common.opt index ad34884..40cab3c 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -422,6 +422,12 @@ Display target specific command line options (including assembler and linker opt -time Driver Alias(time) +;; Truncate the file specified after linking. +;; This option is used by lto-wrapper to reduce the peak disk-usage when +;; linking with many .LTRANS units. +truncate +Driver Separate Undocumented MissingArgError(missing filename after %qs) + -verbose Driver Alias(v) @@ -2138,6 +2138,10 @@ static int have_E = 0; /* Pointer to output file name passed in with -o. */ static const char *output_file = 0; +/* Pointer to input file name passed in with -truncate. + This file should be truncated after linking. */ +static const char *totruncate_file = 0; + /* This is the list of suffixes and codes (%g/%u/%U/%j) and the associated temp file. If the HOST_BIT_BUCKET is used for %j, no entry is made for it here. */ @@ -4538,6 +4542,11 @@ driver_handle_option (struct gcc_options *opts, do_save = false; break; + case OPT_truncate: + totruncate_file = arg; + do_save = false; + break; + case OPT____: /* "-###" This is similar to -v except that there is no execution @@ -9286,6 +9295,11 @@ driver::final_actions () const delete_failure_queue (); delete_temp_files (); + if (totruncate_file != NULL && !seen_error ()) + /* Truncate file specified by -truncate. + Used by lto-wrapper to reduce temporary disk-space usage. */ + truncate(totruncate_file, 0); + if (print_help_list) { printf (("\nFor bug reporting instructions, please see:\n")); |