---
name: "llvm-size"
section: "1"
platform: "linux"
package: "llvm"
version: "23.1.4-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux", "freebsd"]
url: "https://new.carta.tech/llvm-size"
---

# llvm-size(1)

print size information

## NAME

llvm-size - print size information

## SYNOPSIS

**llvm-size** \[*options*\] \[*input...*\]

## DESCRIPTION

**llvm-size** is a tool that prints size information for binary files. It is intended to be a drop-in replacement for GNU's **size**.

The tool prints size information for each **input** specified. If no input is specified, the program prints size information for **a.out**. If "**-**" is specified as an input file, **llvm-size** reads a file from the standard input stream. If an input is an archive, size information will be displayed for all its members.

## OPTIONS

- **-A**

  Equivalent to **--format** with a value of **sysv**.

- **--arch=\<arch\>**

  Architecture(s) from Mach-O universal binaries to display information for.

- **-B**

  Equivalent to **--format** with a value of **berkeley**.

- **--common**

  Include ELF common symbol sizes in bss size for **berkeley** output format, or as a separate section entry for **sysv** output. If not specified, these symbols are ignored.

- **--exclude-pagezero**

  Do not include the **\_\_PAGEZERO** segment when calculating size information for Mach-O files. The **\_\_PAGEZERO** segment is a virtual memory region used for memory protection that does not contribute to actual size, and excluding can provide a better representation of actual size.

- **-d**

  Equivalent to **--radix** with a value of **10**.

- **-l**

  Display verbose address and offset information for segments and sections in Mach-O files in **darwin** format.

- **--format=\<format\>**

  Set the output format to the **\<format\>** specified. Available **\<format\>** options are **berkeley** (the default), **sysv** and **darwin**.

  Berkeley output summarises text, data and bss sizes in each file, as shown below for a typical pair of ELF files:

  ```
  $ llvm-size --format=berkeley test.o test2.o
     text    data     bss     dec     hex filename
      182      16       5     203      cb test.elf
       82       8       1      91      5b test2.o
  ```

  For Mach-O files, the output format is slightly different:

  ```
  $ llvm-size --format=berkeley macho.obj macho2.obj
  __TEXT  __DATA  __OBJC  others  dec     hex
  4       8       0       0       12      c       macho.obj
  16      32      0       0       48      30      macho2.obj
  ```

  Sysv output displays size and address information for most sections, with each file being listed separately:

  ```
  $ llvm-size --format=sysv test.elf test2.o
     test.elf  :
     section       size      addr
     .eh_frame       92   2097496
     .text           90   2101248
     .data           16   2105344
     .bss             5   2105360
     .comment       209         0
     Total          412
     test2.o  :
     section             size   addr
     .text                 26      0
     .data                  8      0
     .bss                   1      0
     .comment             106      0
     .note.GNU-stack        0      0
     .eh_frame             56      0
     .llvm_addrsig          2      0
     Total                199
  ```

  **darwin** format only affects Mach-O input files. If an input of a different file format is specified, **llvm-size** falls back to **berkeley** format. When producing **darwin** format, the tool displays information about segments and sections:

  ```
  $ llvm-size --format=darwin macho.obj macho2.obj
     macho.obj:
     Segment : 12
             Section (__TEXT, __text): 4
             Section (__DATA, __data): 8
             total 12
     total 12
     macho2.obj:
     Segment : 48
             Section (__TEXT, __text): 16
             Section (__DATA, __data): 32
             total 48
     total 48
  ```

- **--help, -h**

  Display a summary of command line options.

- **-m**

  Equivalent to **--format** with a value of **darwin**.

- **-o**

  Equivalent to **--radix** with a value of **8**.

- **--radix=\<value\>**

  Display size information in the specified radix. Permitted values are **8**, **10** (the default) and **16** for octal, decimal and hexadecimal output respectively.

  Example:

  ```
  $ llvm-size --radix=8 test.o
     text    data     bss     oct     hex filename
     0152      04      04     162      72 test.o
  $ llvm-size --radix=10 test.o
     text    data     bss     dec     hex filename
      106       4       4     114      72 test.o
  $ llvm-size --radix=16 test.o
     text    data     bss     dec     hex filename
     0x6a     0x4     0x4     114      72 test.o
  ```

- **--totals, -t**

  Applies only to **berkeley** output format. Display the totals for all listed fields, in addition to the individual file listings.

  Example:

  ```
  $ llvm-size --totals test.elf test2.o
     text    data     bss     dec     hex filename
      182      16       5     203      cb test.elf
       82       8       1      91      5b test2.o
      264      24       6     294     126 (TOTALS)
  ```

- **--version**

  Display the version of the **llvm-size** executable.

- **-x**

  Equivalent to **--radix** with a value of **16**.

- **@\<FILE\>**

  Read command-line options from response file **\<FILE\>**.

## EXIT STATUS

**llvm-size** exits with a non-zero exit code if there is an error. Otherwise, it exits with code 0.

## BUGS

To report bugs, please visit \<\<https://github.com/llvm/llvm-project/labels/tools:llvm-size/\>\>.

## Author

Maintained by the LLVM Team (https://llvm.org/).

## Copyright

2003-2026, LLVM Project