使用非标准路径编译 glib

Question

我正在尝试编译glib-2.32.1，因此我将libffi-3.0.1 安装到以下路径：

~/localroot/lib/

头文件在：

~/localroot/lib/libffi-3.0.11/include/

但是，当我进行配置时：

~/tmp/build_alot/glib-2.32.1 $ ./configure --prefix=~/localroot

我看到以下错误：

checking whether to cache iconv descriptors... no
checking for ZLIB... yes
checking for LIBFFI... no
configure: error: Package requirements (libffi >= 3.0.0) were not met:

No package 'libffi' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables LIBFFI_CFLAGS
and LIBFFI_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

为了成功编译 glib，我需要为 LIBFFI_LIBS 和 LIBFFI_CFLAGS 设置哪些正确值？

一点额外的信息：

当我编译 libffi 时，我得到了以下有用的信息：

库已安装在： /home/nahum/localroot/lib

If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the `-LLIBDIR'
flag during linking and do at least one of the following:
   - add LIBDIR to the `LD_LIBRARY_PATH' environment variable
     during execution
   - add LIBDIR to the `LD_RUN_PATH' environment variable
     during linking
   - use the `-Wl,-rpath -Wl,LIBDIR' linker flag
   - have your system administrator add LIBDIR to `/etc/ld.so.conf'

See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages.
    ----------------------------------------------------------------------
test -z "/home/user/localroot/share/info" || /bin/mkdir -p "/home/user/localroot/share/info"
 /usr/bin/install -c -m 644 ../doc/libffi.info '/home/nahum/localroot/share/info'
 install-info --info-dir='/home/user/localroot/share/info' '/home/user/localroot/share/info/libffi.info'
test -z "/home/user/localroot/lib/pkgconfig" || /bin/mkdir -p "/home/user/localroot/lib/pkgconfig"
 /usr/bin/install -c -m 644 libffi.pc '/home/user/localroot/lib/pkgconfig'
make[3]: Leaving directory `/home/user/tmp/build_alot/libffi-3.0.11/x86_64-unknown-linux-gnu'
make[2]: Leaving directory `/home/user/tmp/build_alot/libffi-3.0.11/x86_64-unknown-linux-gnu'
make[1]: Leaving directory `/home/user/tmp/build_alot/libffi-3.0.11/x86_64-unknown-linux-gnu'

将PKG_CONFIG_PATH 设置为/home/user/localroot/lib/pkgconfig 仍然不会成功。

Answer 1

在启蒙的路上……

我设法编译了 glib：

export LIBFFI_CFLAGS=-I/home/user/localroot/lib/libffi-3.0.11/include
export LIBFFI_LIBS="-L/home/user/localroot/lib -lffi"

现在我必须看看未来的依赖项是否都对我的编译方式感到满意。

Answer 2

对于像我这样想知道 -I 和 -L 和 -lffi 标志来自哪里的人（Oz123 的回答），我发现它们可以在以下位置找到：

/home/user/local-software/libffi-3.1/lib/pkgconfig/libffi.pc

阅读文件给出：

...
...
Libs: -L${toolexeclibdir} -lffi
Cflags: -I${includedir}

使用Libs 和Cflags 位置分别设置LIBFFI_LIBS 和LIBFFI_CFLAGS 变量。现在，如果你运行./configure 然后运行make && make install，事情应该会奏效（至少他们为我做了）。