4 Platform specific notes:
5 ------------------------
9 Apache 2 relies heavily on the use of autoconf and libtool to
10 provide a build environment. Darwin provides these tools as part
11 of the Developers Tools package. Under Darwin, however, GNUlibtool
12 is installed as 'glibtool' to avoid conflicting with the Darwin
13 'libtool' program. Apache 2 knows about this so that's not a
16 As of OS X 10.2 (Jaguar), the bundled versions work perfectly. Partly
17 this is due to the fact that /bin/sh is now 'bash' and not 'zsh' as
18 well as the fact that the bundled versions are up-to-date:
19 autoconf 2.52 and (g)libtool 1.4.2.
21 Earlier versions of OS X are not so fortunate, and the bundled tools
22 are not only older versions, but also, for the most part, do not work
23 well. If you are interested in developing under Darwin, we
24 recommend that you obtain and install replacement versions of what
25 are normally installed on Darwin (and OS X, as of v10.1.5). If
26 you build your own versions of autoconf 2.52 and libtool 1.4.2, be
27 aware that there are some Darwin specific patches to the official
28 code that still must be applied for them to fully work. A useful
31 http://fink.sourceforge.net/doc/porting/libtool.php
33 Pier Fumagalli also provides pre-built Darwin packages of the
34 patched autoconf and libtool suites, available at:
36 http://www.apache.org/~pier/macosx/
38 You will note that GNU libtool should actually be installed as
39 glibtool, to avoid conflict with a Darwin program of the same
40 name. Pier's packages have this change already. All files are
41 installed under /usr/local/ so to use these versions, and be sure
42 that /usr/local/bin is earlier in your PATH.
44 There have been some reports that autoconf 2.52 prevents Apache's
45 build system from correctly handling passing multi-value envvars
46 to the build system (eg: CFLAGS="-g -O3" ./configure), causing
47 errors. Use of bash does not seem to help in this situation. If
48 this affects you, downgrading to autoconf 2.13 (which is installed
51 With Leopard (at least up to 10.5.2), when running configure
52 you will likely see errors such as:
54 rm: conftest.dSYM: is a directory
56 This is a known issue and will be fixed in a later version of the
57 autoconf suite. These errors can be safely ignored.
61 autoconf 2.52 creates scripts that are incompatible with the Posix
62 shell implementation (/bin/sh) on FreeBSD. Be sure to use v2.13
65 Threaded MPMs are not supported on FreeBSD 4.x. Current releases of
66 FreeBSD 5.x (5.2 or later) support threaded MPMs correctly. You must pass
67 '--enable-threads=yes' to APR's configure in order to enable threads.
68 Additionally, you must use libthr or libkse via libmap.conf as the default
69 libc_r is still broken as of this writing. Please consult the man page for
70 libmap.conf for more details about configuring libthr or libkse.
73 The dlopen() system call in HP-UX has problems when loading/unloading
74 C++ modules. The problem can be resolved by using shl_load() instead
75 of dlopen(). This is fixed in the Apache 2.0.44 release.
76 To enable loading of C++ modules, the httpd binary has to be linked with
77 the following libraries :
80 When using shl_load : "cpprt0_stub.s -lcl"
81 When using dlopen : "cpprt0_stub.s -lcl -lCsup"
83 HP-UX (11i version 1.5 and greater):
84 When using dlopen/shl_load : "cpprt0_stub.s -lcl -lunwind"
86 The cpprt0_stub.s can be downloaded from the web site :
87 http://h21007.www2.hp.com/hpux-devtools/CXX/hpux-devtools.0107/0083.html
89 Compile cpprt0_stub.s with the PIC option
90 cc -c +z cpprt0_stub.s
92 gcc -c -fPIC cpprt0_stub.s
94 AIX, using the vendor C compiler with optimization:
95 There is an issue with compiling server/core.c with optimization enabled
96 which has been seen with C for AIX 5.0.2.3 and above. (5.0.2.0, 5.0.2.1,
97 and 5.0.2.2 have an additional problem with Apache 2.0.x, so either upgrade
98 the compiler or don't use optimization in order to avoid it.)
100 cc_r works fine with -O2 but xlc_r does not. In order to use xlc_r with
101 -O2, apply the patch at
103 http://www.apache.org/dist/httpd/patches/apply_to_2.0.49/aix_xlc_optimization.patch
105 (That patch works with many recent levels of Apache 2+.)
110 On Solaris, better performance may be achieved by using the Sun Studio
111 compiler instead of gcc. As of version 11, it is now free (registration
112 required). Download the compiler from:
114 http://developers.sun.com/prodtech/cc/downloads/index.jsp
116 If you use Sun Studio, the following compiler flags (CFLAGS) are