June 2017
Intermediate to advanced
478 pages
13h 14m
English
Content preview from Mastering Embedded Linux Programming - Second Edition
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Package configuration
Tracking package dependencies is quite complex. The package configuration utility pkg-config (https://www.freedesktop.org/wiki/Software/pkg-config/) helps track which packages are installed and which compile flags each needs by keeping a database of Autotools packages in [sysroot]/usr/lib/pkgconfig. For instance, the one for SQLite3 is named sqlite3.pc and contains essential information needed by other packages that need to make use of it:
$ cat $(arm-cortex_a8-linux-gnueabihf-gcc -print-sysroot)/usr/lib/pkgconfig/sqlite3.pc# Package Information for pkg-configprefix=/usrexec_prefix=${prefix}libdir=${exec_prefix}/libincludedir=${prefix}/includeName: SQLiteDescription: SQL database engineVersion: 3.8.11.1Libs: -L${libdir} ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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