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diff --git a/README.OS2 b/README.OS2 new file mode 100644 index 0000000..9e2045e --- /dev/null +++ b/README.OS2 @@ -0,0 +1,176 @@ +Port of GNU make to OS/2. + +Features of GNU make that do not work under OS/2: + - remote job execution + - dynamic load balancing + + +Special features of the OS/2 version: + +Due to the fact that some people might want to use sh syntax in +Makefiles while others might want to use OS/2's native shell cmd.exe, +GNU make supports both shell types. The following list defines the order +that is used to determine the shell: + + 1. The shell specified by the environment variable MAKESHELL. + 2. The shell specified by the SHELL variable within a Makefile. Like + Unix, SHELL is NOT taken from the environment. + 3. The shell specified by the COMSPEC environment variable. + 4. The shell specified by the OS2_SHELL environment variable. + 5. If none of the above is defined /bin/sh is used as default. This + happens e.g. in the make testsuite. + +Note: - Points 3 and 4 can be turned off at compile time by adding + -DNO_CMD_DEFAULT to the CPPFLAGS. + - DOS support is not tested for EMX and therefore might not work. + - The UNIXROOT environment variable is supported to find /bin/sh + if it is not on the current drive. + + +COMPILATION OF GNU MAKE FOR OS/2: + +I. ***** SPECIAL OPTIONS ***** + + - At compile time you can turn off that cmd is used as default shell + (but only /bin/sh). Simply set CPPFLAGS="-DNO_CMD_DEFAULT" and make + will not use cmd unless you cause it to do so by setting MAKESHELL to + cmd or by specifying SHELL=cmd in your Makefile. + + - At compile time you can set CPPFLAGS="-DNO_CHDIR2" to turn off that + GNU make prints drive letters. This is necessary if you want to run + the testsuite. + + +II. ***** REQUIREMENTS FOR THE COMPILATION ***** + +A standard Unix like build environment: + + - sh compatible shell (ksh, bash, ash, but tested only with pdksh 5.2.14 + release 2) + If you use pdksh it is recommended to update to 5.2.14 release 2. Older + versions may not work! You can get this version at + http://www.math.ohio-state.edu/~ilya/software/os2/pdksh-5.2.14-bin-2.zip + - GNU file utilities (make sure that install.exe from the file utilities + is in front of your PATH before X:\OS2\INSTALL\INSTALL.EXE. I recommend + also to change the filename to ginstall.exe instead of install.exe + to avoid confusion with X:\OS2\INSTALL\INSTALL.EXE) + - GNU shell utilities + - GNU text utilities + - gawk + - grep + - sed + - GNU make 3.79.1 (special OS/2 patched version) or higher + - perl 5.005 or higher + - GNU texinfo (you can use 3.1 (gnuinfo.zip), but I recommend 4.0) + +If you want to recreate the configuration files (developers only!) +you need also: GNU m4 1.4, autoconf 2.59, automake 1.9.6 (or compatible) + + +III. ***** COMPILATION AND INSTALLATION ***** + + a) ** Developers only - Everyone else should skip this section ** + To recreate the configuration files use: + + export EMXSHELL=ksh + aclocal -I config + automake + autoconf + autoheader + + +b) Installation into x:/usr + + Note: Although it is possible to compile make using "./configure", + "make", "make install" this is not recommended. In particular, + you must ALWAYS use LDFLAGS="-Zstack 0x6000" because the default + stack size is far to small and make will not work properly! + +Recommended environment variables and installation options: + + export ac_executable_extensions=".exe" + export CPPFLAGS="-D__ST_MT_ERRNO__" + export CFLAGS="-O2 -Zomf -Zmt" + export LDFLAGS="-Zcrtdll -Zlinker /exepack:2 -Zlinker /pm:vio -Zstack 0x6000" + export RANLIB="echo" + ./configure --prefix=x:/usr --infodir=x:/usr/share/info --mandir=x:/usr/share/man --without-included-gettext + make AR=emxomfar + make install + +Note: If you use gcc 2.9.x I recommend to set also LIBS="-lgcc" + +Note: You can add -DNO_CMD_DEFAULT and -DNO_CHDIR2 to CPPFLAGS. + See section I. for details. + + +IV. ***** NLS support ***** + +GNU make has NLS (National Language Support), with the following +caveats: + + a) It will only work with GNU gettext, and + b) GNU gettext support is not included in the GNU make package. + +Therefore, if you wish to enable the internationalization features of +GNU make you must install GNU gettext on your system before configuring +GNU make. + +You can choose the languages to be installed. To install support for +English, German and French only enter: + + export LINGUAS="en de fr" + +If you don't specify LINGUAS all languages are installed. + +If you don't want NLS support (English only) use the option +--disable-nls for the configure script. Note if GNU gettext is not +installed then NLS will not be enabled regardless of this flag. + + +V. ***** Running the make test suite ***** + +To run the included make test suite you have to set + + CPPFLAGS="-D__ST_MT_ERRNO__ -DNO_CMD_DEFAULT -DNO_CHDIR2" + +before you compile make. This is due to some restrictions of the +testsuite itself. -DNO_CMD_DEFAULT causes make to use /bin/sh as default +shell in every case. Normally you could simply set MAKESHELL="/bin/sh" +to do this but the testsuite ignores the environment. -DNO_CHDIR2 causes +make not to use drive letters for directory names (i.e. _chdir2() and +_getcwd2() are NOT used). The testsuite interpretes the whole output of +make, especially statements like make[1]: Entering directory +'C:/somewhere/make-3.79.1/tests' where the testsuite does not expect the +drive letter. This would be interpreted as an error even if there is +none. + +To run the testsuite do the following: + + export CPPFLAGS="-D__ST_MT_ERRNO__ -DNO_CMD_DEFAULT -DNO_CHDIR2" + export CFLAGS="-Zomf -O2 -Zmt" + export LDFLAGS="-Zcrtdll -s -Zlinker /exepack:2 -Zlinker /pm:vio -Zstack 0x6000" + export RANLIB="echo" + ./configure --prefix=x:/usr --disable-nls + make AR=emxomfar + make check + +All tests should work fine with the exception of one of the "INCLUDE_DIRS" +tests which will fail if your /usr/include directory is on a drive different +from the make source tree. + + +------------------------------------------------------------------------------- +Copyright (C) 2003-2014 Free Software Foundation, Inc. +This file is part of GNU Make. + +GNU Make is free software; you can redistribute it and/or modify it under the +terms of the GNU General Public License as published by the Free Software +Foundation; either version 3 of the License, or (at your option) any later +version. + +GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR +A PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program. If not, see <http://www.gnu.org/licenses/>. |