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man: Document system search path environment variables

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None of the environment variables affecting the system include and
library paths were documented. This includes the pkg-config specific
variables like PKG_CONFIG_SYSTEM_INCLUDE_PATH as well as the GCC
variables like C_INCLUDE_PATH.

https://bugs.freedesktop.org/show_bug.cgi?id=99224
This commit is contained in:
Dan Nicholson 2017-03-19 09:37:22 -05:00
parent 4ade8fc901
commit c424a4cf37
1 changed files with 30 additions and 2 deletions
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32
pkg-config.1
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@ -319,11 +319,39 @@ Normally if you request the package "foo" and the package
uninstalled packages. If this environment variable is set, it
disables said behavior.
.TP
.I "PKG_CONFIG_SYSTEM_INCLUDE_PATH"
A path variable containing system directories searched by the compiler.
This is normally
.IR /usr/include .
.TP
.I "CPATH"
.TQ
.I "C_INCLUDE_PATH"
.TQ
.I "CPLUS_INCLUDE_PATH"
Additional paths to append to
.IR "PKG_CONFIG_SYSTEM_INCLUDE_PATH" .
These correspond to environment variables used by many compilers to
affect the header search path.
.TP
.I "PKG_CONFIG_ALLOW_SYSTEM_CFLAGS"
Don't strip -I/usr/include out of cflags.
Don't strip system paths out of Cflags. See
.I "PKG_CONFIG_SYSTEM_INCLUDE_PATH"
for the definition of system paths.
.TP
.I "PKG_CONFIG_SYSTEM_LIBRARY_PATH"
A path variable containing system directories searched by the linker.
This is normally
.I /usr/lib:/lib
but is dependent on the
.I pkg-config
build and can contain other directories such as
.IR /usr/lib64 .
.TP
.I "PKG_CONFIG_ALLOW_SYSTEM_LIBS"
Don't strip -L/usr/lib or -L/lib out of libs.
Don't strip system paths out of Libs. See
.I "PKG_CONFIG_SYSTEM_LIBRARY_PATH"
for the definition of system paths.
.TP
.I "PKG_CONFIG_SYSROOT_DIR"
Modify -I and -L to use the directories located in target sysroot.