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docs/INSTALL: Updated example minimal binary sizes

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Dan Fandrich 2015-10-12 23:47:10 +02:00
parent 3ad83bc3a6
commit db532eff1e
1 changed files with 9 additions and 6 deletions
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docs/INSTALL
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@ -950,9 +950,10 @@ REDUCING SIZE
important factor. First, be sure to set the CFLAGS variable when
configuring with any relevant compiler optimization flags to reduce the
size of the binary. For gcc, this would mean at minimum the -Os option,
and potentially the -march=X and -mdynamic-no-pic options as well, e.g.
and potentially the -march=X, -mdynamic-no-pic and -flto options as well,
e.g.
./configure CFLAGS='-Os' ...
./configure CFLAGS='-Os' LDFLAGS='-Wl,-Bsymbolic'...
Note that newer compilers often produce smaller code than older versions
due to improved optimization.
@ -970,7 +971,9 @@ REDUCING SIZE
--disable-ipv6 (disables support for IPv6)
--disable-manual (disables support for the built-in documentation)
--disable-proxy (disables support for HTTP and SOCKS proxies)
--disable-unix-sockets (disables support for UNIX sockets)
--disable-verbose (eliminates debugging strings and error code strings)
--disable-versioned-symbols (disables support for versioned symbols)
--enable-hidden-symbols (eliminates unneeded symbols in the shared library)
--without-libidn (disables support for the libidn DNS library)
--without-librtmp (disables support for RTMP)
@ -983,7 +986,7 @@ REDUCING SIZE
configure command-line, e.g.
CFLAGS="-Os -ffunction-sections -fdata-sections \
-fno-unwind-tables -fno-asynchronous-unwind-tables" \
-fno-unwind-tables -fno-asynchronous-unwind-tables -flto" \
LDFLAGS="-Wl,-s -Wl,-Bsymbolic -Wl,--gc-sections"
Be sure also to strip debugging symbols from your binaries after
@ -993,9 +996,9 @@ REDUCING SIZE
.comment section).
Using these techniques it is possible to create a basic HTTP-only shared
libcurl library for i386 Linux platforms that is only 114 KiB in size, and
an FTP-only library that is 115 KiB in size (as of libcurl version 7.35.0,
using gcc 4.8.2).
libcurl library for i386 Linux platforms that is only 109 KiB in size, and
an FTP-only library that is 109 KiB in size (as of libcurl version 7.45.0,
using gcc 4.9.2).
You may find that statically linking libcurl to your application will
result in a lower total size than dynamically linking.