From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Petazzoni Date: Tue, 20 Nov 2018 17:35:19 +0100 Subject: [Buildroot] [PATCH next v5 6/9] package/pkg-generic: adjust config scripts tweaks for per-package folders In-Reply-To: <20181120163522.4281-1-thomas.petazzoni@bootlin.com> References: <20181120163522.4281-1-thomas.petazzoni@bootlin.com> Message-ID: <20181120163522.4281-7-thomas.petazzoni@bootlin.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net This commit adjusts the logic in pkg-generic.mk that tweaks the *-config shell scripts installed by various libraries to make it compatible with per-package folders. This requires two fixes: - replacing $(STAGING_DIR) with a relative path from the config script to the staging directory, rather than using an absolute path of the staging directory. Without this, a *-config script provided by package A, but called from package B per-package folder will return paths from package A per-package folder: $ ./output/per-package/mcrypt/host/usr//sysroot/usr/bin/libmcrypt-config --libs -L..../output/per-package/libmcrypt/host/usr//sysroot/usr/lib/ The libmcrypt-config script is installed by the libmcrypt package, and mcrypt is a package that depends on libmcrypt. When we call the libmcrypt-config script from the mcrypt per-package folder, it returns a -L flag that points to the libmcrypt per-package folder. One might say: but this is OK, since the sysroot of the libmcrypt per-package folder also contains the libmcrypt library. This is true, but we encounter a more subtle issue: because -L paths are considered before standard paths, ld ends up finding libc.so in the libmcrypt per-package folder. This libc.so file is a linker script that looks like this: GROUP ( /lib/libc.so.6 /usr/lib/libc_nonshared.a AS_NEEDED ( /lib/ld-linux.so.3 ) ) Normally, thanks to ld sysroot awareness, /lib/libc.so.6 in this script is re-interpreted according to the sysroot. But in this case, the library is *outside* the compiler sysroot. Remember: we are using the compiler/linker from the "mcrypt" per-package folder, but we found "libc.so.6" in the "libmcrypt" per-package folder. This causes the linker to really use the /lib/libc.so.6 from the host machine, obvisouly leading to a build failure such as: output/per-package/libgcrypt/host/opt/ext-toolchain/bin/../lib/gcc/nios2-linux-gnu/7.3.1/../../../../nios2-linux-gnu/bin/ld: cannot find /lib/libc.so.6 output/per-package/libgcrypt/host/opt/ext-toolchain/bin/../lib/gcc/nios2-linux-gnu/7.3.1/../../../../nios2-linux-gnu/bin/ld: cannot find /usr/lib/libc_nonshared.a output/per-package/libgcrypt/host/opt/ext-toolchain/bin/../lib/gcc/nios2-linux-gnu/7.3.1/../../../../nios2-linux-gnu/bin/ld: cannot find /lib/ld-linux-nios2.so.1 - Some *-config scripts, such as the apr-1-config script, contain references to host tools: CC=".../output/per-package/apr/hosr/bin/arm-linux-gcc" CCP=".../output/per-package/apr/hosr/bin/arm-linux-cpp" We also want to replace those with proper relative paths. To achieve this, we need to also replace $(HOST_DIR) with a relative path. Since $(STAGING_DIR) is inside $(HOST_DIR), the first replacement of $(STAGING_DIR) by @STAGING_DIR@ is no longer needed: replacing $(HOST_DIR) by @HOST_DIR@ is sufficient. We still need to replace @STAGING_DIR@ by the proper path though, as we introduce @STAGING_DIR@ references in exec_prefix and prefix variables, as well as -I and -L flags. Signed-off-by: Thomas Petazzoni --- package/pkg-generic.mk | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/package/pkg-generic.mk b/package/pkg-generic.mk index 309fd8cd48..9b4db845b6 100644 --- a/package/pkg-generic.mk +++ b/package/pkg-generic.mk @@ -275,12 +275,13 @@ $(BUILD_DIR)/%/.stamp_staging_installed: $(foreach hook,$($(PKG)_POST_INSTALL_STAGING_HOOKS),$(call $(hook))$(sep)) $(Q)if test -n "$($(PKG)_CONFIG_SCRIPTS)" ; then \ $(call MESSAGE,"Fixing package configuration files") ;\ - $(SED) "s,$(BASE_DIR), at BASE_DIR@,g" \ - -e "s,$(STAGING_DIR), at STAGING_DIR@,g" \ + $(SED) "s,$(HOST_DIR), at HOST_DIR@,g" \ + -e "s,$(BASE_DIR), at BASE_DIR@,g" \ -e "s,^\(exec_\)\?prefix=.*,\1prefix=@STAGING_DIR@/usr,g" \ -e "s,-I/usr/,-I at STAGING_DIR@/usr/,g" \ -e "s,-L/usr/,-L at STAGING_DIR@/usr/,g" \ - -e "s, at STAGING_DIR@,$(STAGING_DIR),g" \ + -e 's, at STAGING_DIR@,$$(dirname $$0)/../..,g' \ + -e 's, at HOST_DIR@,$$(dirname $$0)/../../../..,g' \ -e "s, at BASE_DIR@,$(BASE_DIR),g" \ $(addprefix $(STAGING_DIR)/usr/bin/,$($(PKG)_CONFIG_SCRIPTS)) ;\ fi -- 2.19.1