Accept GNU ld's -t, -n and -i

They are GNU ld's short names for --trace, --nmagic and -r.

https://github.com/rui314/mold/pull/1731.

docs/mold.md

@@ -417,10 +417,13 @@ point symbol in a script.
 * `-m` _target_:
   Choose a _target_.
 
+* `-n`, `--nmagic`, `--no-nmagic`:
+  Do not align sections to page boundaries.
+
 * `-o` _file_, `--output`=_file_:
   Use _file_ as the output file name instead of the default name `a.out`.
 
-* `-r`, `--relocatable`:
+* `-r`, `-i`, `--relocatable`:
   Instead of generating an executable or a shared object file, combine input
   object files to generate another object file that can be used as an input to
   a linker.
@@ -428,6 +431,9 @@ point symbol in a script.
 * `-s`, `--strip-all`:
   Omit `.symtab` section from the output file.
 
+* `-t`, `--trace`:
+  Print name of each input file.
+
 * `-u` _symbol_, `--undefined`=_symbol_:
   If _symbol_ remains as an undefined symbol after reading all object files,
   and if there is a static archive that contains an object file defining
@@ -784,9 +790,6 @@ point symbol in a script.
 * `--sysroot`=_dir_:
   Set target system root directory to _dir_.
 
-* `--trace`:
-  Print name of each input file.
-
 * `--undefined-glob`=_pattern_:
   Synonym for `--undefined`, except that `--undefined-glob` takes a glob
   pattern instead of just a single symbol name.

elf/cmdline.rs

@@ -52,10 +52,13 @@ Options:
   -l LIBNAME, --library LIBNAME
                               Search for a given library
   -m TARGET                   Set target
+  -n, --nmagic                Do not page align sections
+    --no-nmagic
   -o FILE, --output FILE      Set output filename
   -q, --emit-relocs           Leaves relocation sections in the output
-  -r, --relocatable           Generate relocatable output
+  -r, -i, --relocatable       Generate relocatable output
   -s, --strip-all             Strip .symtab section
+  -t, --trace                 Print the name of each input file
   -u SYMBOL, --undefined SYMBOL
                               Force to resolve SYMBOL
   -w, --no-warnings           Suppress warnings
@@ -128,8 +131,6 @@ Options:
   --init SYMBOL               Call SYMBOL at load-time
   --mmap-output-file          Write the output file using mmap (default)
     --no-mmap-output-file
-  --nmagic                    Do not page align sections
-    --no-nmagic
   --no-undefined              Report undefined symbols (even with --shared)
   --noinhibit-exec            Create an output file even if errors occur
   --oformat=binary            Omit ELF, section, and program headers
@@ -177,7 +178,6 @@ Options:
                               Use COUNT number of threads
   --threads                   Use multiple threads (default)
     --no-threads
-  --trace                     Print the name of each input file
   --undefined-glob PATTERN    Force to resolve all symbols that match a given pattern
   --undefined-version         Do not report version scripts that refer to undefined symbols
     --no-undefined-version    Report version scripts that refer to undefined symbols (default)
@@ -1395,7 +1395,7 @@ pub fn parse_args(target: &TargetTraits, raw_cmdline: &[Cow<'_, OsStr>]) -> Pars
             cursor.read_switch("apply-dynamic-relocs", "no-apply-dynamic-relocs")
         {
             a.apply_dynamic_relocs = value;
-        } else if cursor.read_flag("trace") {
+        } else if cursor.read_flag("trace") || cursor.read_flag("t") {
             a.trace = true;
         } else if let Some(value) = cursor.read_switch("eh-frame-hdr", "no-eh-frame-hdr") {
             a.eh_frame_hdr = value;
@@ -1412,7 +1412,8 @@ pub fn parse_args(target: &TargetTraits, raw_cmdline: &[Cow<'_, OsStr>]) -> Pars
             a.relax = value;
         } else if let Some(value) = cursor.read_switch("gdb-index", "no-gdb-index") {
             a.gdb_index = value;
-        } else if cursor.read_flag("r") || cursor.read_flag("relocatable") {
+        } else if cursor.read_flag("r") || cursor.read_flag("i") || cursor.read_flag("relocatable")
+        {
             a.relocatable = true;
             a.emit_relocs = true;
         } else if cursor.read_flag("relocatable-merge-sections") {
@@ -1674,6 +1675,8 @@ pub fn parse_args(target: &TargetTraits, raw_cmdline: &[Cow<'_, OsStr>]) -> Pars
             a.z_rewrite_endbr = false;
         } else if let Some(value) = cursor.read_switch("nmagic", "no-nmagic") {
             a.nmagic = value;
+        } else if cursor.read_flag("n") {
+            a.nmagic = true;
         } else if cursor.read_flag("fatal-warnings") {
             mold_common::error::set_fatal_warnings(true);
         } else if cursor.read_flag("no-fatal-warnings") {

tests/elf/nmagic.sh

@@ -7,8 +7,11 @@ EOF
 
 $CC -B. -o $t/exe1 $t/a.o -nostdlib -Wl,-nmagic
 $CC -B. -o $t/exe2 $t/a.o -nostdlib
+$CC -B. -o $t/exe3 $t/a.o -nostdlib -Wl,-n
 
 end1=$(nm $t/exe1 | grep ' end$' | cut -d' ' -f1)
 end2=$(nm $t/exe2 | grep ' end$' | cut -d' ' -f1)
+end3=$(nm $t/exe3 | grep ' end$' | cut -d' ' -f1)
 
 [ $((0x$end1)) -lt $((0x$end2)) ]
+[ $end1 = $end3 ]

tests/elf/relocatable.sh

@@ -18,3 +18,6 @@ EOF
 
 $CC -B. -o $t/exe $t/c.o
 $QEMU $t/exe
+
+./mold -i -o $t/d.o $t/a.o $t/b.o
+cmp $t/c.o $t/d.o

tests/elf/trace.sh

@@ -12,3 +12,6 @@ EOF
 
 $CC -B. -o $t/exe $t/a.o -Wl,-trace > $t/log
 grep '/a\.o$' $t/log
+
+$CC -B. -o $t/exe $t/a.o -Wl,-t > $t/log2
+grep '/a\.o$' $t/log2