Change Details

This implements https://sourceware.org/bugzilla/show_bug.cgi?id=26404#c6 --overwrite-script specifies a script which contains several `SECTIONS` commands. Each `SECTIONS` specifies exactly one output section description. The initial syntax is intentionally narrow. Symbol assignments cannot be used. Not supporting multiple output section descriptions in one `SECTIONS` makes it clear the sections don't have order guarantee. The semantics are similar to `INSERT [BEFORE|AFTER]`: LinkerScript::hasSectionsCommand is not set. --overwrite-script can be more convenient without a main script because --overwrite-script does not need a random anchor section used by `INSERT`. This feature is versatile. To list a few usage: * Use `KEEP(...)` to retain sections under GC * Define encapsulation symbols (start/end) for an output section * Use `: ALIGN(...)` to overalign an output section

This implements https://sourceware.org/bugzilla/show_bug.cgi?id=26404#c6 --overwrite-script specifies a script which contains several `SECTIONS` commands. Each `SECTIONS` specifies exactly one output section description. The initial syntax is intentionally narrow. Symbol assignments cannot be used. Not supporting multiple output section descriptions in one `SECTIONS` makes it clear the sections don't have order guarantee. The semantics are similar to `INSERT [BEFORE|AFTER]`: LinkerScript::hasSectionsCommand is not set. --overwrite-script can be more convenient without a main script because --overwrite-script does not need a random anchor section used by `INSERT`. This feature is versatile. To list a few usage: * Use `section : { KEEP(...) }` to retain input sections under GC * Define encapsulation symbols (start/end) for an output section * Use `section : ALIGN(...) : { ... }` to overalign an output section (similar to ld64 `-sectalign`)

This implements https://sourceware.org/bugzilla/show_bug.cgi?id=26404#c6 --overwrite-script specifies a script which contains several `SECTIONS` commands. Each `SECTIONS` specifies exactly one output section description. The initial syntax is intentionally narrow. Symbol assignments cannot be used. Not supporting multiple output section descriptions in one `SECTIONS` makes it clear the sections don't have order guarantee. The semantics are similar to `INSERT [BEFORE|AFTER]`: LinkerScript::hasSectionsCommand is not set. --overwrite-script can be more convenient without a main script because --overwrite-script does not need a random anchor section used by `INSERT`. This feature is versatile. To list a few usage: * Use `section : { KEEP(...) }` to retainin input sections under GC * Define encapsulation symbols (start/end) for an output section * Use `section : ALIGN(...)` : { ... }` to overalign an output section (similar to ld64 `-sectalign`)