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ccache: Force ccache to use its internal zlib

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The problem is that without this, ccache would link against the zlib
of the build system, but we might build and install a different
version of zlib in $(O)/host afterwards, which ccache will pick
up. This might break if there is a version mismatch. A solution would
be to add host-zlib has a dependency of ccache, but it would require
tuning the zlib .mk file to use HOSTCC_NOCCACHE as the
compiler. Instead, we take the easy path: tell ccache to use its
internal copy of zlib, so that ccache has zero dependency besides the
C library.

Fixes bug #4808.

Thanks to Raúl Sánchez Siles <rsanchezs@infoglobal.es> for reporting
the bug and testing the proposed solution.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Thomas Petazzoni 2012-03-07 20:26:49 +01:00 committed by Peter Korsgaard
parent 335260afd4
commit 7ea11dafff
1 changed files with 11 additions and 0 deletions
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11
package/ccache/ccache.mk
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@ -14,6 +14,17 @@ CCACHE_SOURCE = ccache-$(CCACHE_VERSION).tar.bz2
HOST_CCACHE_CONF_ENV = \ HOST_CCACHE_CONF_ENV = \
CC="$(HOSTCC_NOCCACHE)" CC="$(HOSTCC_NOCCACHE)"
# Force ccache to use its internal zlib. The problem is that without
# this, ccache would link against the zlib of the build system, but we
# might build and install a different version of zlib in $(O)/host
# afterwards, which ccache will pick up. This might break if there is
# a version mismatch. A solution would be to add host-zlib has a
# dependency of ccache, but it would require tuning the zlib .mk file
# to use HOSTCC_NOCCACHE as the compiler. Instead, we take the easy
# path: tell ccache to use its internal copy of zlib, so that ccache
# has zero dependency besides the C library.
HOST_CCACHE_CONF_OPT += ccache_cv_zlib_1_2_3=no
# We directly hardcode the cache location into the binary, as it is # We directly hardcode the cache location into the binary, as it is
# much easier to handle than passing an environment variable. # much easier to handle than passing an environment variable.
define HOST_CCACHE_FIX_CCACHE_DIR define HOST_CCACHE_FIX_CCACHE_DIR