8 # "newlib-nano" is what the official ARM embedded toolchain calls this build
9 # configuration that prioritizes low space usage. We include it as a preset
10 # for embedded projects striving for a similar configuration.
11 nanoizeNewlib ? false,
14 stdenv.mkDerivation (finalAttrs: {
16 version = "4.5.0.20241231";
19 url = "ftp://sourceware.org/pub/newlib/newlib-${finalAttrs.version}.tar.gz";
20 sha256 = "sha256-M/EmBeAFSWWZbCXBOCs+RjsK+ReZAB9buMBjDy7IyFI=";
23 patches = lib.optionals nanoizeNewlib [
24 # https://bugs.gentoo.org/723756
26 name = "newlib-3.3.0-no-nano-cxx.patch";
27 url = "https://gitweb.gentoo.org/repo/gentoo.git/plain/sys-libs/newlib/files/newlib-3.3.0-no-nano-cxx.patch?id=9ee5a1cd6f8da6d084b93b3dbd2e8022a147cfbf";
28 sha256 = "sha256-S3mf7vwrzSMWZIGE+d61UDH+/SK/ao1hTPee1sElgco=";
33 buildPackages.stdenv.cc
34 texinfo # for makeinfo
37 # newlib expects CC to build for build platform, not host platform
43 # newlib tries to disable itself when building for Linux *except*
44 # when native-compiling. Unfortunately the check for "is cross
45 # compiling" was written when newlib was part of GCC and newlib
46 # was built along with GCC (therefore newlib was built to execute
47 # on the targetPlatform, not the hostPlatform). Unfortunately
48 # when newlib was extracted from GCC, this "is cross compiling"
49 # logic was not fixed. So we must disable it.
51 substituteInPlace configure --replace 'noconfigdirs target-newlib target-libgloss' 'noconfigdirs'
52 substituteInPlace configure --replace 'cross_only="target-libgloss target-newlib' 'cross_only="'
55 configurePlatforms = [
59 # flags copied from https://community.arm.com/support-forums/f/compilers-and-libraries-forum/53310/gcc-arm-none-eabi-what-were-the-newlib-compilation-options
65 # The newlib configury uses `host` to refer to the platform
66 # which is being used to compile newlib. Ugh. It does this
67 # because of its history: newlib used to be distributed with and
68 # built as part of gcc.
70 # To prevent nixpkgs from going insane, this package presents the
71 # "normal" view to the outside world: the binaries in $out will
72 # execute on `stdenv.hostPlatform`. We then fool newlib's build
73 # process into doing the right thing.
74 "--host=${stdenv.targetPlatform.config}"
78 if !nanoizeNewlib then
80 "--disable-newlib-supplied-syscalls"
82 "--enable-newlib-io-c99-formats"
83 "--enable-newlib-io-long-long"
84 "--enable-newlib-reent-check-verify"
85 "--enable-newlib-register-fini"
86 "--enable-newlib-retargetable-locking"
90 "--disable-newlib-fseek-optimization"
91 "--disable-newlib-fvwrite-in-streamio"
92 "--disable-newlib-supplied-syscalls"
93 "--disable-newlib-unbuf-stream-opt"
94 "--disable-newlib-wide-orient"
97 "--enable-newlib-global-atexit"
98 "--enable-newlib-nano-formatted-io"
99 "--enable-newlib-nano-malloc"
100 "--enable-newlib-reent-check-verify"
101 "--enable-newlib-reent-small"
102 "--enable-newlib-retargetable-locking"
106 enableParallelBuilding = true;
107 dontDisableStatic = true;
109 # apply necessary nano changes from https://developer.arm.com/-/media/Files/downloads/gnu/12.2.rel1/manifest/copy_nano_libraries.sh?rev=4c50be6ccb9c4205a5262a3925317073&hash=1375A7B0A1CD0DB9B9EB0D2B574ADF66
111 lib.optionalString nanoizeNewlib ''
112 mkdir -p $out${finalAttrs.passthru.incdir}/newlib-nano
113 cp $out${finalAttrs.passthru.incdir}/newlib.h $out${finalAttrs.passthru.incdir}/newlib-nano/
116 cd $out${finalAttrs.passthru.libdir}
118 for f in librdimon.a libc.a libm.a libg.a libgloss.a; do
119 # Some libraries are only available for specific architectures.
120 # For example, librdimon.a is only available on ARM.
121 [ -f "$f" ] && cp "$f" "''${f%%\.a}_nano.a"
125 + ''[ "$(find $out -type f | wc -l)" -gt 0 ] || (echo '$out is empty' 1>&2 && exit 1)'';
128 incdir = "/${stdenv.targetPlatform.config}/include";
129 libdir = "/${stdenv.targetPlatform.config}/lib";
133 description = "C library intended for use on embedded systems";
134 homepage = "https://sourceware.org/newlib/";
135 # arch has "bsd" while gentoo has "NEWLIB LIBGLOSS GPL-2" while COPYING has "gpl2"
136 # there are 5 copying files in total
142 license = licenses.gpl2Plus;