1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
|
{ lib, stdenv
, targetPackages
, withoutTargetLibc, libcCross
, threadsCross
, version
, binutils, gmp, mpfr, libmpc, isl
, cloog ? null
, enableLTO
, enableMultilib
, enablePlugin
, disableGdbPlugin ? !enablePlugin
, enableShared
, langC
, langCC
, langD ? false
, langFortran
, langJava ? false, javaAwtGtk ? false, javaAntlr ? null, javaEcj ? null
, langAda ? false
, langGo
, langObjC
, langObjCpp
, langJit
, disableBootstrap ? stdenv.targetPlatform != stdenv.hostPlatform
}:
assert !enablePlugin -> disableGdbPlugin;
assert langJava -> lib.versionOlder version "7";
# Note [Windows Exception Handling]
# sjlj (short jump long jump) exception handling makes no sense on x86_64,
# it's forcably slowing programs down as it produces a constant overhead.
# On x86_64 we have SEH (Structured Exception Handling) and we should use
# that. On i686, we do not have SEH, and have to use sjlj with dwarf2.
# Hence it's now conditional on x86_32 (i686 is 32bit).
#
# ref: https://stackoverflow.com/questions/15670169/what-is-difference-between-sjlj-vs-dwarf-vs-seh
let
inherit (stdenv)
buildPlatform hostPlatform targetPlatform;
# See https://github.com/NixOS/nixpkgs/pull/209870#issuecomment-1500550903
disableBootstrap' = disableBootstrap && !langFortran && !langGo;
crossMingw = targetPlatform != hostPlatform && targetPlatform.libc == "msvcrt";
crossDarwin = targetPlatform != hostPlatform && targetPlatform.libc == "libSystem";
targetPrefix = lib.optionalString (stdenv.targetPlatform != stdenv.hostPlatform)
"${stdenv.targetPlatform.config}-";
crossConfigureFlags =
# Ensure that -print-prog-name is able to find the correct programs.
[
"--with-as=${if targetPackages.stdenv.cc.bintools.isLLVM then binutils else targetPackages.stdenv.cc.bintools}/bin/${targetPlatform.config}-as"
"--with-ld=${targetPackages.stdenv.cc.bintools}/bin/${targetPlatform.config}-ld"
]
++ (if withoutTargetLibc then [
"--disable-libssp"
"--disable-nls"
"--without-headers"
"--disable-threads"
"--disable-libgomp"
"--disable-libquadmath"
(lib.enableFeature enableShared "shared")
"--disable-libatomic" # requires libc
"--disable-decimal-float" # requires libc
"--disable-libmpx" # requires libc
] ++ lib.optionals crossMingw [
"--with-headers=${lib.getDev libcCross}/include"
"--with-gcc"
"--with-gnu-as"
"--with-gnu-ld"
"--disable-debug"
"--disable-win32-registry"
"--enable-hash-synchronization"
"--enable-libssp"
"--disable-nls"
# To keep ABI compatibility with upstream mingw-w64
"--enable-fully-dynamic-string"
] ++ lib.optionals (crossMingw && targetPlatform.isx86_32) [
# See Note [Windows Exception Handling]
"--enable-sjlj-exceptions"
"--with-dwarf2"
] else [
(if crossDarwin then "--with-sysroot=${lib.getLib libcCross}/share/sysroot"
else "--with-headers=${lib.getDev libcCross}${libcCross.incdir or "/include"}")
"--enable-__cxa_atexit"
"--enable-long-long"
"--enable-threads=${if targetPlatform.isUnix then "posix"
else if targetPlatform.isWindows then (threadsCross.model or "win32")
else "single"}"
"--enable-nls"
] ++ lib.optionals (targetPlatform.libc == "uclibc" || targetPlatform.libc == "musl") [
# libsanitizer requires netrom/netrom.h which is not
# available in uclibc.
"--disable-libsanitizer"
] ++ lib.optional (targetPlatform.libc == "newlib" || targetPlatform.libc == "newlib-nano") "--with-newlib"
++ lib.optional (targetPlatform.libc == "avrlibc") "--with-avrlibc"
);
configureFlags =
# Basic dependencies
[
"--with-gmp-include=${gmp.dev}/include"
"--with-gmp-lib=${gmp.out}/lib"
"--with-mpfr-include=${mpfr.dev}/include"
"--with-mpfr-lib=${mpfr.out}/lib"
"--with-mpc=${libmpc}"
]
++ lib.optionals (!withoutTargetLibc) [
(if libcCross == null
then "--with-native-system-header-dir=${lib.getDev stdenv.cc.libc}/include"
else "--with-native-system-header-dir=${lib.getDev libcCross}${libcCross.incdir or "/include"}")
# gcc builds for cross-compilers (build != host) or cross-built
# gcc (host != target) always apply the offset prefix to disentangle
# target headers from build or host headers:
# ${with_build_sysroot}${native_system_header_dir}
# or ${test_exec_prefix}/${target_noncanonical}/sys-include
# or ${with_sysroot}${native_system_header_dir}
# While native build (build == host == target) uses passed headers
# path as is:
# ${with_build_sysroot}${native_system_header_dir}
#
# Nixpkgs uses flat directory structure for both native and cross
# cases. As a result libc headers don't get found for cross case
# and many modern features get disabled (libssp is used instead of
# target-specific implementations and similar). More details at:
# https://github.com/NixOS/nixpkgs/pull/181802#issuecomment-1186822355
#
# We pick "/" path to effectively avoid sysroot offset and make it work
# as a native case.
"--with-build-sysroot=/"
]
# Basic configuration
++ [
# Force target prefix. The behavior if `--target` and `--host`
# are specified is inconsistent: Sometimes specifying `--target`
# always causes a prefix to be generated, sometimes it's only
# added if the `--host` and `--target` differ. This means that
# sometimes there may be a prefix even though nixpkgs doesn't
# expect one and sometimes there may be none even though nixpkgs
# expects one (since not all information is serialized into the
# config attribute). The easiest way out of these problems is to
# always set the program prefix, so gcc will conform to our
# expectations.
"--program-prefix=${targetPrefix}"
(lib.enableFeature enableLTO "lto")
"--disable-libstdcxx-pch"
"--without-included-gettext"
"--with-system-zlib"
"--enable-static"
"--enable-languages=${
lib.concatStringsSep ","
( lib.optional langC "c"
++ lib.optional langCC "c++"
++ lib.optional langD "d"
++ lib.optional langFortran "fortran"
++ lib.optional langJava "java"
++ lib.optional langAda "ada"
++ lib.optional langGo "go"
++ lib.optional langObjC "objc"
++ lib.optional langObjCpp "obj-c++"
++ lib.optionals crossDarwin [ "objc" "obj-c++" ]
++ lib.optional langJit "jit"
)
}"
]
++ (if (enableMultilib || targetPlatform.isAvr)
then ["--enable-multilib" "--disable-libquadmath"]
else ["--disable-multilib"])
++ lib.optional (!enableShared) "--disable-shared"
++ lib.singleton (lib.enableFeature enablePlugin "plugin")
# Libcc1 is the GCC cc1 plugin for the GDB debugger which is only used by gdb
++ lib.optional disableGdbPlugin "--disable-libcc1"
# Support -m32 on powerpc64le/be
++ lib.optional (targetPlatform.system == "powerpc64le-linux")
"--enable-targets=powerpcle-linux"
++ lib.optional (targetPlatform.system == "powerpc64-linux")
"--enable-targets=powerpc-linux"
# Fix "unknown long double size, cannot define BFP_FMT"
++ lib.optional (targetPlatform.isPower && targetPlatform.isMusl)
"--disable-decimal-float"
# Optional features
++ lib.optional (isl != null) "--with-isl=${isl}"
++ lib.optionals (lib.versionOlder version "5" && cloog != null) [
"--with-cloog=${cloog}"
"--disable-cloog-version-check"
"--enable-cloog-backend=isl"
]
# Ada options, gcc can't build the runtime library for a cross compiler
++ lib.optional langAda
(if hostPlatform == targetPlatform
then "--enable-libada"
else "--disable-libada")
# Java options
++ lib.optionals langJava [
"--with-ecj-jar=${javaEcj}"
# Follow Sun's layout for the convenience of IcedTea/OpenJDK. See
# <http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2010-April/008888.html>.
"--enable-java-home"
"--with-java-home=\${prefix}/lib/jvm/jre"
]
++ lib.optional javaAwtGtk "--enable-java-awt=gtk"
++ lib.optional (langJava && javaAntlr != null) "--with-antlr-jar=${javaAntlr}"
++ import ../common/platform-flags.nix { inherit (stdenv) targetPlatform; inherit lib; }
++ lib.optionals (targetPlatform != hostPlatform) crossConfigureFlags
++ lib.optional disableBootstrap' "--disable-bootstrap"
# Platform-specific flags
++ lib.optional (targetPlatform == hostPlatform && targetPlatform.isx86_32) "--with-arch=${stdenv.hostPlatform.parsed.cpu.name}"
++ lib.optional targetPlatform.isNetBSD "--disable-libssp" # Provided by libc.
++ lib.optionals hostPlatform.isSunOS [
"--enable-long-long" "--enable-libssp" "--enable-threads=posix" "--disable-nls" "--enable-__cxa_atexit"
# On Illumos/Solaris GNU as is preferred
"--with-gnu-as" "--without-gnu-ld"
]
++ lib.optional (targetPlatform.libc == "musl")
# musl at least, disable: https://git.buildroot.net/buildroot/commit/?id=873d4019f7fb00f6a80592224236b3ba7d657865
"--disable-libmpx"
++ lib.optionals (targetPlatform == hostPlatform && targetPlatform.libc == "musl") [
"--disable-libsanitizer"
"--disable-symvers"
"libat_cv_have_ifunc=no"
"--disable-gnu-indirect-function"
]
++ lib.optionals langJit [
"--enable-host-shared"
]
++ lib.optionals (langD) [
"--with-target-system-zlib=yes"
]
# On mips64-unknown-linux-gnu libsanitizer defines collide with
# glibc's definitions and fail the build. It was fixed in gcc-13+.
++ lib.optionals (targetPlatform.isMips && targetPlatform.parsed.abi.name == "gnu" && lib.versions.major version == "12") [
"--disable-libsanitizer"
]
;
in configureFlags
|