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How To Compile
Curl has been compiled and built on numerous different operating systems.
Most systems build curl the same way (unix-style). Continue reading below for
more details if you're one of them.
If you're using Windows (95/98/NT/ME/2000/XP or similar), VMS, RISC OS or OS/2
or cross-compile, you should continue reading from one the paragraphs further
down.
UNIX
====
A normal unix installation is made in three or four steps (after you've
unpacked the source archive):
./configure
make
make test (optional)
make install
You probably need to be root when doing the last command.
If you want to install curl in a different file hierarchy than /usr/local,
you need to specify that already when running configure:
./configure --prefix=/path/to/curl/tree
The configure script always tries to find a working SSL library unless
explicitly told not to. If you have OpenSSL installed in the default search
path for your compiler/linker, you don't need to do anything special. If
you have OpenSSL installed in /usr/local/ssl, you can run configure like:
./configure --with-ssl
If you have OpenSSL installed somewhere else (for example, /opt/OpenSSL,)
you can run configure like this:
./configure --with-ssl=/opt/OpenSSL
If you insist on forcing a build without SSL support, even though you may
have OpenSSL installed in your system, you can run configure like this:
./configure --without-ssl
If you have OpenSSL installed, but with the libraries in one place and the
header files somewhere else, you have to set the LDFLAGS and CPPFLAGS
environment variables prior to running configure. Something like this
should work:
(with the Bourne shell and its clones):
CPPFLAGS="-I/path/to/ssl/include" LDFLAGS="-L/path/to/ssl/lib" \
./configure
(with csh, tcsh and their clones):
env CPPFLAGS="-I/path/to/ssl/include" LDFLAGS="-L/path/to/ssl/lib" \
./configure
If your SSL library was compiled with rsaref (usually for use in the United
States), you may also need to set:
LIBS=-lRSAglue -lrsaref
(as suggested by Doug Kaufman)
KNOWN PROBLEMS (these ones should not happen anymore)
If you happen to have autoconf installed, but a version older than 2.12
you will get into trouble. Then you can still build curl by issuing these
commands (note that this requires curl to be built staticly): (from Ralph
Beckmann)
./configure [...]
cd lib; make; cd ..
cd src; make; cd ..
cp src/curl elsewhere/bin/
As suggested by David West, you can make a faked version of autoconf and
autoheader:
----start of autoconf----
#!/bin/bash
#fake autoconf for building curl
if [ "$1" = "--version" ] then
echo "Autoconf version 2.13"
fi
----end of autoconf----
Then make autoheader a symbolic link to the same script and make sure
they're executable and set to appear in the path *BEFORE* the actual (but
obsolete) autoconf and autoheader scripts.
MORE OPTIONS
To force configure to use the standard cc compiler if both cc and gcc are
present, run configure like
CC=cc ./configure
or
env Cc=cc ./configure
To force a static library compile, disable the shared library creation
by running configure like:
./configure --disable-shared
To tell the configure script to skip searching for thread-safe functions,
add an option like:
./configure --disable-thread
To build curl with kerberos4 support enabled, curl requires the krb4 libs
and headers installed. You can then use a set of options to tell
configure where those are:
--with-krb4-includes[=DIR] Specify location of kerberos4 headers
--with-krb4-libs[=DIR] Specify location of kerberos4 libs
--with-krb4[=DIR] where to look for Kerberos4
In most cases, /usr/athena is the install prefix and then it works with
./configure --with-krb4=/usr/athena
If you're a curl developer and use gcc, you might want to enable more
debug options with the --enable-debug option.
Win32
=====
Without SSL:
MingW32 (GCC-2.95) style
------------------------
Run the 'mingw32.bat' file to get the proper environment variables
set, then run 'make mingw32' in the root dir.
If you have any problems linking libraries or finding header files, be
sure to verify that the provided "Makefile.m32" files use the proper
paths, and adjust as necessary.
Cygwin style
------------
Almost identical to the unix installation. Run the configure script in
the curl root with 'sh configure'. Make sure you have the sh
executable in /bin/ or you'll see the configure fail towards the end.
Run 'make'
Microsoft command line style
----------------------------
Run the 'vcvars32.bat' file to get the proper environment variables
set, then run 'nmake vc' in the root dir.
The vcvars32.bat file is part of the Microsoft development
environment.
IDE-style
-------------------------
If you use VC++, Borland or similar compilers. Include all lib source
files in a static lib "project" (all .c and .h files that is).
(you should name it libcurl or similar)
Make the sources in the src/ drawer be a "win32 console application"
project. Name it curl.
With VC++, add 'ws2_32.lib' to the link libs when you build curl!
Borland seems to do that itself magically. Of course you have to make
sure it links with the libcurl too!
For VC++ 6, there's an included Makefile.vc6 that should be possible
to use out-of-the-box.
Microsoft note: add /Zm200 to the compiler options to increase the
compiler's memory allocation limit, as the hugehelp.c won't compile
due to "too long puts string".
With SSL:
MingW32 (GCC-2.95) style
------------------------
Run the 'mingw32.bat' file to get the proper environment variables
set, then run 'make mingw32-ssl' in the root dir.
If you have any problems linking libraries or finding header files, be
sure to look at the provided "Makefile.m32" files for the proper
paths, and adjust as necessary.
Cygwin style
------------
Haven't done, nor got any reports on how to do. It should although be
identical to the unix setup for the same purpose. See above.
Microsoft command line style
----------------------------
Please read the OpenSSL documentation on how to compile and install
the OpenSSL libraries. The build process of OpenSSL generates the
libeay32.dll and ssleay32.dll files in the out32dll subdirectory in
the OpenSSL home directory. OpenSSL static libraries (libeay32.lib,
ssleay32.lib, RSAglue.lib) are created in the out32 subdirectory.
Run the 'vcvars32.bat' file to get a proper environment. The
vcvars32.bat file is part of the Microsoft development environment and
you may find it in 'C:\Program Files\Microsoft Visual Studio\vc98\bin'
provided that you installed Visual C/C++ 6 in the default directory.
Before running nmake define the OPENSSL_PATH environment variable with
the root/base directory of OpenSSL, for example:
set OPENSSL_PATH=c:\openssl-0.9.6b
Then run 'nmake vc-ssl' or 'nmake vc-ssl-dll' in curl's root
directory. 'nmake vc-ssl' will create a libcurl static and dynamic
libraries in the lib subdirectory, as well as a statically linked
version of curl.exe in the src subdirectory. This statically linked
version is a standalone executable not requiring any DLL at
runtime. This make method requires that you have the static OpenSSL
libraries available in OpenSSL's out32 subdirectory.
'nmake vc-ssl-dll' creates the libcurl dynamic library and
links curl.exe against libcurl and OpenSSL dynamically.
This executable requires libcurl.dll and the OpenSSL DLLs
at runtime.
Microsoft / Borland style
-------------------------
If you have OpenSSL, and want curl to take advantage of it, edit your
project properties to use the SSL include path, link with the SSL libs
and define the USE_SSLEAY symbol.
Disabling Specific Protocols:
The configure utility, unfortunately, is not available for the Windows
environment, therefore, you cannot use the various disable-protocol
options of the configure utility on this platform.
However, you can use the following defines to disable specific
protocols:
HTTP_ONLY disables all protocols except HTTP
CURL_DISABLE_FTP disables FTP
CURL_DISABLE_LDAP disables LDAP
CURL_DISABLE_TELNET disables TELNET
CURL_DISABLE_DICT disables DICT
CURL_DISABLE_FILE disables FILE
CURL_DISABLE_GOPHER disables GOPHER
If you want to set any of these defines you have the following
possibilities:
- Modify lib/setup.h
- Modify lib/Makefile.vc6
- Add defines to Project/Settings/C/C++/General/Preprocessor Definitions
in the curllib.dsw/curllib.dsp Visual C++ 6 IDE project.
IBM OS/2
========
Building under OS/2 is not much different from building under unix.
You need:
- emx 0.9d
- GNU make
- GNU patch
- ksh
- GNU bison
- GNU file utilities
- GNU sed
- autoconf 2.13
If you want to build with OpenSSL or OpenLDAP support, you'll need to
download those libraries, too. Dirk Ohme has done some work to port SSL
libraries under OS/2, but it looks like he doesn't care about emx. You'll
find his patches on: http://come.to/Dirk_Ohme
If during the linking you get an error about _errno being an undefined
symbol referenced from the text segment, you need to add -D__ST_MT_ERRNO__
in your definitions.
If everything seems to work fine but there's no curl.exe, you need to add
-Zexe to your linker flags.
If you're getting huge binaries, probably your makefiles have the -g in
CFLAGS.
VMS
===
(The VMS section is in whole contributed by the friendly Nico Baggus)
This is the first attempt at porting cURL to VMS.
Curl seems to work with FTP & HTTP other protocols are not tested. (the
perl http/ftp testing server supplied as testing too cannot work on VMS
because vms has no concept of fork(). [ I tried to give it a whack, but
thats of no use.
SSL stuff has not been ported.
Telnet has about the same issues as for Win32. When the changes for Win32
are clear maybe they'l work for VMS too. The basic problem is that select
ONLY works for sockets.
Marked instances of fopen/[f]stat that might become a problem, especially
for non stream files. In this regard, the files opened for writing will be
created stream/lf and will thus be safe. Just keep in mind that non-binary
read/wring from/to files will have a records size limit of 32767 bytes
imposed.
Stat to get the size of the files is again only safe for stream files &
fixed record files without implied CC.
-- My guess is that only allowing access to stream files is the quickest
way to get around the most issues. Therefore all files need to to be
checked to be sure they will be stream/lf before processing them. This is
the easiest way out, I know. The reason for this is that code that needs to
report the filesize will become a pain in the ass otherwise.
Exit status.... Well we needed something done here,
VMS has a structured exist status:
| 3 | 2 | 1 | 0|
|1098|765432109876|5432109876543|210|
+----+------------+-------------+---+
|Ctrl| Facility | Error code |sev|
+----+------------+-------------+---+
With the Ctrl-bits an application can tell if part or the whole message has
allready been printed from the program, DCL doesn't need to print it again.
Facility - basicaly the program ID. A code assigned to the program
the name can be fetched from external or internal message libraries
Errorcode - the errodes assigned by the application
Sev. - severity: Even = error, off = non error
0 = Warning
1 = Success
2 = Error
3 = Information
4 = Fatal
<5-7> reserved.
This all presents itself with:
%<FACILITY>-<SeV>-<Errorname>, <Error message>
See also the src/curlmsg.msg file, it has the source for the messages In
src/main.c a section is devoted to message status values, the globalvalues
create symbols with certain values, referenced from a compiled message
file. Have all exit function use a exit status derived from a translation
table with the compiled message codes.
This was all compiled with:
Compaq C V6.2-003 on OpenVMS Alpha V7.1-1H2
So far for porting notes as of:
13-jul-2001
N. Baggus
QNX
===
(This section was graciously brought to us by David Bentham)
As QNX is targetted for resource constrained environments, the QNX headers
set conservative limits. This includes the FD_SETSIZE macro, set by default
to 32. Socket descriptors returned within the CURL library may exceed this,
resulting in memory faults/SIGSEGV crashes when passed into select(..)
calls using fd_set macros.
A good all-round solution to this is to override the default when building
libcurl, by overriding CFLAGS during configure, example
# configure CFLAGS='-DFD_SETSIZE=64 -g -O2'
CROSS COMPILE
=============
(This section was graciously brought to us by Jim Duey, 23-oct-2001)
Download and unpack the cURL package. Version should be 7.9.1 or later.
'cd' to the new directory. (ie. curl-7.9.1-pre4)
Set environment variables to point to the cross-compile toolchain and call
configure with any options you need. Be sure and specify the '--host' and
'--build' parameters at configuration time. The following script is an
example of cross-compiling for the IBM 405GP PowerPC processor using the
toolchain from MonteVista for Hardhat Linux.
(begin script)
#! /bin/sh
export PATH=$PATH:/opt/hardhat/devkit/ppc/405/bin
export CPPFLAGS="-I/opt/hardhat/devkit/ppc/405/target/usr/include"
export AR=ppc_405-ar
export AS=ppc_405-as
export LD=ppc_405-ld
export RANLIB=ppc_405-ranlib
export CC=ppc_405-gcc
export NM=ppc_405-nm
configure --target=powerpc-hardhat-linux \
--host=powerpc-hardhat-linux \
--build=i586-pc-linux-gnu \
--prefix=/opt/hardhat/devkit/ppc/405/target/usr/local \
--exec-prefix=/usr/local
(end script)
The '--prefix' parameter specifies where cURL will be installed. If
'configure' completes successfully, do 'make' and 'make install' as usual.
PORTS
=====
This is a probably incomplete list of known hardware and operating systems
that curl has been compiled for. If you know a system curl compiles and
runs on, that isn't listed, please let us know!
- Alpha DEC OSF 4
- Alpha Digital UNIX v3.2
- Alpha FreeBSD 4.1, 4.5
- Alpha Linux 2.2, 2.4
- Alpha NetBSD 1.5.2
- Alpha OpenBSD 3.0
- Alpha OpenVMS V7.1-1H2
- Alpha Tru64 v5.0 5.1
- HP-PA HP-UX 9.X 10.X 11.X
- HP-PA Linux
- MIPS IRIX 6.2, 6.5
- MIPS Linux
- Pocket PC/Win CE 3.0
- Power AIX 4.2, 4.3.1, 4.3.2, 5.1
- PowerPC Darwin 1.0
- PowerPC Linux
- PowerPC Mac OS 9
- PowerPC Mac OS X
- SINIX-Z v5
- Sparc Linux
- Sparc Solaris 2.4, 2.5, 2.5.1, 2.6, 7, 8
- Sparc SunOS 4.1.X
- StrongARM (and other ARM) RISC OS 3.1, 4.02
- StrongARM Linux 2.4
- StrongARM NetBSD 1.4.1
- Ultrix 4.3a
- i386 BeOS
- i386 FreeBSD
- i386 HURD
- i386 Linux 1.3, 2.0, 2.2, 2.3, 2.4
- i386 NetBSD
- i386 OS/2
- i386 OpenBSD
- i386 SCO unix
- i386 Solaris 2.7
- i386 Windows 95, 98, ME, NT, 2000
- i386 QNX 6
- ia64 Linux 2.3.99
- m68k AmigaOS 3
- m68k Linux
- m68k OpenBSD
- s390 Linux
OpenSSL
=======
You'll find OpenSSL information at:
http://www.openssl.org
MingW32/Cygwin
==============
You'll find MingW32 and Cygwin information at:
http://www.mingw.org
OpenLDAP
========
You'll find OpenLDAP information at:
http://www.openldap.org
You need to install it with shared libraries, which is enabled when running
the ldap configure script with "--enable-shared". With my linux 2.0.36
kernel I also had to disable using threads (with --without-threads),
because the configure script couldn't figure out my system.