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Author: tml Date: 2001-10-27 17:55:11 GMT 2001-10-27 Tor Lillqvist <tml@iki.fi> New Win32 feature to make pkg-config useful for users of MSVC: with the flag --msvc-syntax, munge -L and -l flags appropriately for the MSVC command-line compiler. (-I flags are the same.) * README.win32: Update. * main.c (main): Add --msvc-syntax flag. * pkg-config.1: Document it. * pkg.h: Declare msvc_syntax. * parse.c (parse_libs): Obey msvc_syntax.
50 lines
2.5 KiB
Text
50 lines
2.5 KiB
Text
pkg-config on Win32
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===================
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This file describes pkg-config for "pure" Win32. (With Cygwin,
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pkg-config 0.8.0 builds fine right out of the box. Cygwin is just
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another Unix variant, as far as pkg-config is concerned.) I don't to
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call this "pure" Win32 target mingw, as pkg-config is usable also by
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MSVC users.
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There should be no compile-time paths built into the executable of
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pkg-config. Likewise, not in the libraries it describes either.
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pkg-config uses some optional entries in the Registry: Firstly, the
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path to the pkgconfig installation prefix. This can be either
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user-specific in HKCU\Software\pkgconfig\InstallationDirectory or for
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the whole machine in HKLM\Software\pkgconfig\InstallationDirectory.
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If pkg-config.exe is invoked from the "bin" subdirectory of a
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directory with a lib/pkgconfig subdirectory, no Registry entry is even
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needed, as pkgconfig figures out the directory by itself. (The
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g_win32_get_package_installation_directory() function in GLib.)
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Additionally, in addition to the PKG_CONFIG_PATH environment
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variables, any string value in the Registry key
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HKLM\Software\pkgconfig\PKG_CONFIG_PATH (or HKCU\...) is assumed to be
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a directory name and is searched for .pc files.
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When pkg-config is invoked on Windows, it tries to set the "prefix"
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variable for each .pc file read to "top" of the directory tree where
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the .pc file is located. This is done only if the .pc file is in a
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path that ends in "lib/pkgconfig". Thus, if an end-user (developer)
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installs headers, import libraries and .pc files in the normal
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subdirectories under some random directory, everything should just
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work, even if the .pc file for that software doesn't know the true
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directory name, but contains the path used on the packager's
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site. This works as long as the .pc file uses the variable name
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"prefix" for its installation prefix. At least GLib, ATK, Pango and
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GTK does this.
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On Unix, pkg-config is built using its own copy of GLib 1.2.8. On
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Windows, we use the normal GLib available for Windows (1.3.10
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currently). Yes, this does introduce a circular dependency, but that
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can be worked around. The circular dependency only appears if one uses
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the configure mechanism to build GLib. GLib's configure script checks
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for pkg-config. pkg-config depends on GLib. Thus, starting from
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scratch, with no GLib and no pkg-config, using configure, there would
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indeed be a Catch-22 situation. However, GLib can be built just fine
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using the manually written makefiles for mingw or MSVC. And if
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somebody does want to build GLib on Win32 using configure, she can
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first install a prebuilt pkgconfig.
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