ffado: prevent build tools from leaking into closure #63393
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FFADO stored paths to various build dependencies and libraries like gcc or pyuic5 (from PyQT) in $out/lib/libffado/static_info.txt, thus bringing them into the runtime closure. With Nix, this information is not really critical, as we can find out the exact dependencies from .drv files in Nix store. This alone reduced the closure size from 914866184B to 132341176B.
$ nix-store --query --requisites result
/nix/store/db2fz1d8hka8xcyw4755ks081ljxwgac-glibc-2.27
/nix/store/dz6dhbkhnkndl7a32jy8kqrvs5g9fvq5-attr-2.4.48
/nix/store/3zh8j07mmv95n9qp2148rfsjhrkcz58x-acl-2.2.53
/nix/store/cm6x466hzrwcq61rsh3453fsph0ck1dd-zlib-1.2.11
/nix/store/8kf59z8q8g3hyc59pf0ixm5k3mm310fl-libxml2-2.9.9
/nix/store/7hq0wxbhazg19h4wgh5v5dqbm0z9f7vh-libxml2-2.9.9-bin
/nix/store/6m9adqfdcb7x6n6hhnyfafmpadwwni0v-gdbm-1.18.1
/nix/store/fffhmcqg5rm4r725k460q2cbdjyipsp7-ncurses-6.1-20190112
/nix/store/fyxcppddjg7abrand8n10gwzm5gknc48-bash-4.4-p23
/nix/store/lzr52znq4d5cmsh78igfpazn3yqcsz7w-bzip2-1.0.6.0.1
/nix/store/qpp08241qa4bs89grb4m5nvh62xkp1wb-sqlite-3.28.0
/nix/store/rf0vravaj1hw37jhvg2lcjpp6h28z308-openssl-1.0.2r
/nix/store/sszpfjnh35jqgkngj83h1y0s7p61vy05-readline-6.3p08
/nix/store/5pjs9xxfafd44falpdb84i83979bm6fv-gcc-7.4.0-lib
/nix/store/vj0db3ypvnllkdk4ivnnhm7il5gcc56p-db-5.3.28
/nix/store/wpjdad5wpylnpqbjw4dbnih8f6q32l43-coreutils-8.31
/nix/store/9yi3j41iwz045cn8h6brghi3lzsd886k-python-2.7.16
/nix/store/9879dlarsbvck0k51vgdgikna6mywr30-libxml2-2.9.9-py
/nix/store/grkzwylk1avdfcwsqjwsnpqykpvj7kcn-hook
/nix/store/i019wrkx4xn76j1bxv3mmsc7d07a35gl-zlib-1.2.11-dev
/nix/store/5b5i4fs55wyr7gnawrmqcvjlb220zl9s-libxml2-2.9.9-dev
/nix/store/8rp92p5ymdbb2rxj614m01g0ny9zpv3r-libsigc++-2.10.1
/nix/store/a8i076fl02y0p7bnbiii7f17ggm14lxy-pcre-8.43
/nix/store/avw23jg806xzlcbqqq6chgc3i899mhba-libconfig-1.7.2
/nix/store/kwl4klw1a0mqgarxqa8bq25kf7i6c5k9-libffi-3.2.1
/nix/store/v9fq83x2a11sv1hq4jb01yj5bfnidfd0-util-linux-2.33.2
/nix/store/qf3rwf9pzzsnaxn2iizwcqj1nm9w11l5-glib-2.60.2
/nix/store/f0i55s1fk9dgmlfjg0v39cn0s0l0aryb-glibmm-2.60.0
/nix/store/fxzma5h494cnnjfm819i9ag9q6i6ixwm-libxml++-3.0.1
/nix/store/gx27x5g28kbv9ap9avw9k9hmrgwi4cqc-libraw1394-2.1.2
/nix/store/hxkrphb3b6420msb95zbka1jhx22xm6j-libiec61883-1.2.0
/nix/store/z289spadcv4k0vd89dsz0229hg41xfrs-libavc1394-0.5.4
/nix/store/jj58kypzaq2raixr9af9zcshp2viccm7-ffado-2.4.1The last few offenders are |
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By splitting |
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Yes, this looks reasonable. Everything using JACK (including PulseAudio) will thank us. $ nix-store --query --requisites result
/nix/store/db2fz1d8hka8xcyw4755ks081ljxwgac-glibc-2.27
/nix/store/5pjs9xxfafd44falpdb84i83979bm6fv-gcc-7.4.0-lib
/nix/store/cm6x466hzrwcq61rsh3453fsph0ck1dd-zlib-1.2.11
/nix/store/8kf59z8q8g3hyc59pf0ixm5k3mm310fl-libxml2-2.9.9
/nix/store/8rp92p5ymdbb2rxj614m01g0ny9zpv3r-libsigc++-2.10.1
/nix/store/a8i076fl02y0p7bnbiii7f17ggm14lxy-pcre-8.43
/nix/store/kwl4klw1a0mqgarxqa8bq25kf7i6c5k9-libffi-3.2.1
/nix/store/v9fq83x2a11sv1hq4jb01yj5bfnidfd0-util-linux-2.33.2
/nix/store/qf3rwf9pzzsnaxn2iizwcqj1nm9w11l5-glib-2.60.2
/nix/store/f0i55s1fk9dgmlfjg0v39cn0s0l0aryb-glibmm-2.60.0
/nix/store/4wdkh0g4iw3k71s4a3wih0660b01lb5i-libxml++-3.0.1
/nix/store/avw23jg806xzlcbqqq6chgc3i899mhba-libconfig-1.7.2
/nix/store/gx27x5g28kbv9ap9avw9k9hmrgwi4cqc-libraw1394-2.1.2
/nix/store/hxkrphb3b6420msb95zbka1jhx22xm6j-libiec61883-1.2.0
/nix/store/z289spadcv4k0vd89dsz0229hg41xfrs-libavc1394-0.5.4
/nix/store/9nw5danx7b02gbxl96jc8hzr1mwnlyfk-ffado-2.4.1 |
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FFADO stored paths to various build dependencies and libraries like gcc or pyuic5 (from PyQT) in
$out/lib/libffado/static_info.txt, thus bringing them into the runtime closure.With Nix, this information is not really critical, as we can find out the exact dependencies from .drv files in Nix store.
This alone reduced the closure size from 914866184B to 132341176B.