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[build] Eliminate unused sections at link-time

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Use -ffunction-sections, -fdata-sections, and --gc-sections to
automatically prune out any unreferenced sections.

This saves around 744 bytes (uncompressed) from the rtl8139.rom build.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2011-02-22 19:36:24 +00:00
parent f3c72660a7
commit 623469de5d
6 changed files with 37 additions and 10 deletions
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14
src/arch/i386/scripts/i386.lds
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@@ -49,7 +49,8 @@ SECTIONS {
.text16.early 0x0 : AT ( _text16_early_lma ) {
_text16 = .;
*(.text16.null)
KEEP(*(.text16.null))
KEEP(*(.text16.null.*))
. += 1; /* Prevent NULL being valid */
*(.text16.early)
*(.text16.early.*)
@@ -98,7 +99,8 @@ SECTIONS {
.textdata 0x0 : AT ( _textdata_lma ) {
_textdata = .;
*(.text.null_trap)
KEEP(*(.text.null_trap))
KEEP(*(.text.null_trap.*))
. += 1; /* Prevent NULL being valid */
*(.text)
*(.text.*)
@@ -106,7 +108,7 @@ SECTIONS {
*(.rodata.*)
*(.data)
*(.data.*)
*(SORT(.tbl.*)) /* Various tables. See include/tables.h */
KEEP(*(SORT(.tbl.*))) /* Various tables. See include/tables.h */
_mtextdata = .;
} .bss.textdata (NOLOAD) : AT ( _end_lma ) {
*(.bss)
@@ -126,8 +128,8 @@ SECTIONS {
.zinfo 0x0 : AT ( _zinfo_lma ) {
_zinfo = .;
*(.zinfo)
*(.zinfo.*)
KEEP(*(.zinfo))
KEEP(*(.zinfo.*))
_mzinfo = .;
} .bss.zinfo (NOLOAD) : AT ( _end_lma ) {
_ezinfo = .;
@@ -143,6 +145,7 @@ SECTIONS {
.weak 0x0 : AT ( _end_lma ) {
_weak = .;
*(.weak)
*(.weak.*)
_eweak = .;
}
_assert = ASSERT ( ( _weak == _eweak ), ".weak is non-zero length" );
@@ -165,6 +168,7 @@ SECTIONS {
*(.einfo)
*(.einfo.*)
*(.discard)
*(.discard.*)
}
/*