diff options
Diffstat (limited to 'doc/stdenv.xml')
| -rw-r--r-- | doc/stdenv.xml | 51 |
1 files changed, 35 insertions, 16 deletions
diff --git a/doc/stdenv.xml b/doc/stdenv.xml index a14d78afe71a..dbffdad9fdee 100644 --- a/doc/stdenv.xml +++ b/doc/stdenv.xml @@ -31,9 +31,28 @@ stdenv.mkDerivation { separate Nix expression from <filename>pkgs/all-packages.nix</filename>, you need to pass it as a function argument.) Specifying a <varname>name</varname> and a <varname>src</varname> is the absolute minimum - you need to do. Many packages have dependencies that are not provided in the - standard environment. It’s usually sufficient to specify those - dependencies in the <varname>buildInputs</varname> attribute: + Nix requires. For convenience, you can also use <varname>pname</varname> and + <varname>version</varname> attributes and <literal>mkDerivation</literal> + will automatically set <varname>name</varname> to + <literal>"${pname}-${version}"</literal> by default. Since + <link xlink:href="https://github.com/NixOS/rfcs/pull/35">RFC 0035</link>, + this is preferred for packages in Nixpkgs, as it allows us to reuse the + version easily: +<programlisting> +stdenv.mkDerivation rec { + pname = "libfoo"; + version = "1.2.3"; + src = fetchurl { + url = "http://example.org/libfoo-source-${version}.tar.bz2"; + sha256 = "0x2g1jqygyr5wiwg4ma1nd7w4ydpy82z9gkcv8vh2v8dn3y58v5m"; + }; +}</programlisting> + </para> + + <para> + Many packages have dependencies that are not provided in the standard + environment. It’s usually sufficient to specify those dependencies in the + <varname>buildInputs</varname> attribute: <programlisting> stdenv.mkDerivation { name = "libfoo-1.2.3"; @@ -324,7 +343,7 @@ let f(h, t, i) = i + (if i <= 0 then h else t - 1) let f(h, h + 1, i) = i + (if i <= 0 then h else (h + 1) - 1) let f(h, h + 1, i) = i + (if i <= 0 then h else h) let f(h, h + 1, i) = i + h - </programlisting> +</programlisting> This is where "sum-like" comes in from above: We can just sum all of the host offsets to get the host offset of the transitive dependency. The target offset is the transitive dependency is simply the host offset + 1, just as @@ -2210,7 +2229,7 @@ someVar=$(stripHash $name) array by doing something like <programlisting language="bash"> addEnvHooks "$hostOffset" myBashFunction - </programlisting> +</programlisting> </para> <para> @@ -2648,8 +2667,8 @@ addEnvHooks "$hostOffset" myBashFunction that is supposed to be inspected, add <literal>breakpointHook</literal> to <literal>nativeBuildInputs</literal>. <programlisting> - nativeBuildInputs = [ breakpointHook ]; - </programlisting> +nativeBuildInputs = [ breakpointHook ]; +</programlisting> When a build failure happens there will be an instruction printed that shows how to attach with <literal>cntr</literal> to the build sandbox. </para> @@ -2844,7 +2863,7 @@ addEnvHooks "$hostOffset" myBashFunction printf(help_message); ^ cc1plus: some warnings being treated as errors - </programlisting> +</programlisting> </listitem> </varlistentry> <varlistentry> @@ -2866,7 +2885,7 @@ cc1plus: some warnings being treated as errors <programlisting> bin/blib.a(bios_console.o): In function `bios_handle_cup': /tmp/nix-build-ipxe-20141124-5cbdc41.drv-0/ipxe-5cbdc41/src/arch/i386/firmware/pcbios/bios_console.c:86: undefined reference to `__stack_chk_fail' - </programlisting> +</programlisting> </listitem> </varlistentry> <varlistentry> @@ -2895,19 +2914,19 @@ bin/blib.a(bios_console.o): In function `bios_handle_cup': <programlisting> malloc.c:404:15: error: return type is an incomplete type malloc.c:410:19: error: storage size of 'ms' isn't known - </programlisting> +</programlisting> <programlisting> strdup.h:22:1: error: expected identifier or '(' before '__extension__' - </programlisting> +</programlisting> <programlisting> strsep.c:65:23: error: register name not specified for 'delim' - </programlisting> +</programlisting> <programlisting> installwatch.c:3751:5: error: conflicting types for '__open_2' - </programlisting> +</programlisting> <programlisting> fcntl2.h:50:4: error: call to '__open_missing_mode' declared with attribute error: open with O_CREAT or O_TMPFILE in second argument needs 3 arguments - </programlisting> +</programlisting> </listitem> </varlistentry> <varlistentry> @@ -2932,7 +2951,7 @@ fcntl2.h:50:4: error: call to '__open_missing_mode' declared with attribute erro <programlisting> ccbLfRgg.s: Assembler messages: ccbLfRgg.s:33: Error: missing or invalid displacement expression `private_key_len@GOTOFF' - </programlisting> +</programlisting> </listitem> </varlistentry> <varlistentry> @@ -2996,7 +3015,7 @@ ccbLfRgg.s:33: Error: missing or invalid displacement expression `private_key_le </para> <programlisting> intel_drv.so: undefined symbol: vgaHWFreeHWRec - </programlisting> +</programlisting> </listitem> </varlistentry> </variablelist> |