tjh.dev
1{
2 lib,
3 stdenv,
4 enableMultilib,
5 targetConfig,
6}:
7
8let
9 forceLibgccToBuildCrtStuff = import ./libgcc-buildstuff.nix { inherit lib stdenv; };
10 isCross = !lib.systems.equals stdenv.targetPlatform stdenv.hostPlatform;
11in
12
13# We don't support multilib and cross at the same time
14assert !(enableMultilib && isCross);
15
16originalAttrs:
17(stdenv.mkDerivation (
18 finalAttrs:
19 originalAttrs
20 // {
21 passthru = (originalAttrs.passthru or { }) // {
22 inherit forceLibgccToBuildCrtStuff;
23 };
24 preUnpack = ''
25 oldOpts="$(shopt -po nounset)" || true
26 set -euo pipefail
27
28 export NIX_FIXINC_DUMMY="$NIX_BUILD_TOP/dummy"
29 mkdir "$NIX_FIXINC_DUMMY"
30
31 if test "$staticCompiler" = "1"; then
32 EXTRA_LDFLAGS="-static"
33 elif test "''${NIX_DONT_SET_RPATH-}" != "1"; then
34 EXTRA_LDFLAGS="-Wl,-rpath,''${!outputLib}/lib"
35 else
36 EXTRA_LDFLAGS=""
37 fi
38
39 # GCC interprets empty paths as ".", which we don't want.
40 if test -z "''${CPATH-}"; then unset CPATH; fi
41 if test -z "''${LIBRARY_PATH-}"; then unset LIBRARY_PATH; fi
42 echo "\$CPATH is \`''${CPATH-}'"
43 echo "\$LIBRARY_PATH is \`''${LIBRARY_PATH-}'"
44
45 if test "$noSysDirs" = "1"; then
46
47 declare -g \
48 EXTRA_FLAGS_FOR_BUILD EXTRA_FLAGS EXTRA_FLAGS_FOR_TARGET \
49 EXTRA_LDFLAGS_FOR_BUILD EXTRA_LDFLAGS_FOR_TARGET
50
51 # Extract flags from Bintools Wrappers
52 for post in '_FOR_BUILD' ""; do
53 curBintools="NIX_BINTOOLS''${post}"
54
55 declare -a extraLDFlags=()
56 if [[ -e "''${!curBintools}/nix-support/orig-libc" ]]; then
57 # Figure out what extra flags when linking to pass to the gcc
58 # compilers being generated to make sure that they use our libc.
59 extraLDFlags=($(< "''${!curBintools}/nix-support/libc-ldflags") $(< "''${!curBintools}/nix-support/libc-ldflags-before" || true))
60 if [ -e ''${!curBintools}/nix-support/ld-set-dynamic-linker ]; then
61 extraLDFlags=-dynamic-linker=$(< ''${!curBintools}/nix-support/dynamic-linker)
62 fi
63
64 # The path to the Libc binaries such as `crti.o'.
65 libc_libdir="$(< "''${!curBintools}/nix-support/orig-libc")/lib"
66 else
67 # Hack: support impure environments.
68 extraLDFlags=("-L/usr/lib64" "-L/usr/lib")
69 libc_libdir="/usr/lib"
70 fi
71 declare -a prefixExtraLDFlags=()
72 prefixExtraLDFlags=("-L$libc_libdir")
73 nixDontSetRpathVar=NIX_DONT_SET_RPATH''${post}
74 if test "''${!nixDontSetRpathVar-}" != "1"; then
75 prefixExtraLDFlags+=("-rpath" "$libc_libdir")
76 fi
77 extraLDFlags=("''${prefixExtraLDFlags[@]}" "''${extraLDFlags[@]}")
78 for i in "''${extraLDFlags[@]}"; do
79 declare -g EXTRA_LDFLAGS''${post}+=" -Wl,$i"
80 done
81 done
82
83 # Extract flags from CC Wrappers
84 for post in '_FOR_BUILD' ""; do
85 curCC="NIX_CC''${post}"
86 curFIXINC="NIX_FIXINC_DUMMY''${post}"
87
88 declare -a extraFlags=()
89 if [[ -e "''${!curCC}/nix-support/orig-libc" ]]; then
90 # Figure out what extra compiling flags to pass to the gcc compilers
91 # being generated to make sure that they use our libc.
92 extraFlags=($(< "''${!curCC}/nix-support/libc-crt1-cflags") $(< "''${!curCC}/nix-support/libc-cflags"))
93
94 # The path to the Libc headers
95 libc_devdir="$(< "''${!curCC}/nix-support/orig-libc-dev")"
96
97 # Use *real* header files, otherwise a limits.h is generated that
98 # does not include Libc's limits.h (notably missing SSIZE_MAX,
99 # which breaks the build).
100 declare -g NIX_FIXINC_DUMMY''${post}="$libc_devdir/include"
101 else
102 # Hack: support impure environments.
103 extraFlags=("-isystem" "/usr/include")
104 declare -g NIX_FIXINC_DUMMY''${post}=/usr/include
105 fi
106
107 extraFlags=("-I''${!curFIXINC}" "''${extraFlags[@]}")
108
109 # BOOT_CFLAGS defaults to `-g -O2'; since we override it below, make
110 # sure to explictly add them so that files compiled with the bootstrap
111 # compiler are optimized and (optionally) contain debugging information
112 # (info "(gccinstall) Building").
113 if test -n "''${dontStrip-}"; then
114 extraFlags=("-O2" "-g" "''${extraFlags[@]}")
115 else
116 # Don't pass `-g' at all; this saves space while building.
117 extraFlags=("-O2" "''${extraFlags[@]}")
118 fi
119
120 declare -g EXTRA_FLAGS''${post}="''${extraFlags[*]}"
121 done
122
123 if test -z "''${targetConfig-}"; then
124 # host = target, so the flags are the same
125 EXTRA_FLAGS_FOR_TARGET="$EXTRA_FLAGS"
126 EXTRA_LDFLAGS_FOR_TARGET="$EXTRA_LDFLAGS"
127 fi
128
129 # CFLAGS_FOR_TARGET are needed for the libstdc++ configure script to find
130 # the startfiles.
131 # FLAGS_FOR_TARGET are needed for the target libraries to receive the -Bxxx
132 # for the startfiles.
133 makeFlagsArray+=(
134 "BUILD_SYSTEM_HEADER_DIR=$NIX_FIXINC_DUMMY_FOR_BUILD"
135 "SYSTEM_HEADER_DIR=$NIX_FIXINC_DUMMY_FOR_BUILD"
136 "NATIVE_SYSTEM_HEADER_DIR=$NIX_FIXINC_DUMMY"
137
138 "LDFLAGS_FOR_BUILD=$EXTRA_LDFLAGS_FOR_BUILD"
139 #"LDFLAGS=$EXTRA_LDFLAGS"
140 "LDFLAGS_FOR_TARGET=$EXTRA_LDFLAGS_FOR_TARGET"
141
142 "CFLAGS_FOR_BUILD=$EXTRA_FLAGS_FOR_BUILD $EXTRA_LDFLAGS_FOR_BUILD"
143 "CXXFLAGS_FOR_BUILD=$EXTRA_FLAGS_FOR_BUILD $EXTRA_LDFLAGS_FOR_BUILD"
144 "FLAGS_FOR_BUILD=$EXTRA_FLAGS_FOR_BUILD $EXTRA_LDFLAGS_FOR_BUILD"
145
146 # It seems there is a bug in GCC 5
147 #"CFLAGS=$EXTRA_FLAGS $EXTRA_LDFLAGS"
148 #"CXXFLAGS=$EXTRA_FLAGS $EXTRA_LDFLAGS"
149
150 "CFLAGS_FOR_TARGET=$EXTRA_FLAGS_FOR_TARGET $EXTRA_LDFLAGS_FOR_TARGET"
151 "CXXFLAGS_FOR_TARGET=$EXTRA_FLAGS_FOR_TARGET $EXTRA_LDFLAGS_FOR_TARGET"
152 "FLAGS_FOR_TARGET=$EXTRA_FLAGS_FOR_TARGET $EXTRA_LDFLAGS_FOR_TARGET"
153 )
154
155 if test -z "''${targetConfig-}"; then
156 makeFlagsArray+=(
157 "BOOT_CFLAGS=$EXTRA_FLAGS $EXTRA_LDFLAGS"
158 "BOOT_LDFLAGS=$EXTRA_FLAGS_FOR_TARGET $EXTRA_LDFLAGS_FOR_TARGET"
159 )
160 fi
161
162 if test "$withoutTargetLibc" == 1; then
163 # We don't want the gcc build to assume there will be a libc providing
164 # limits.h in this stage
165 makeFlagsArray+=(
166 'LIMITS_H_TEST=false'
167 )
168 else
169 makeFlagsArray+=(
170 'LIMITS_H_TEST=true'
171 )
172 fi
173 fi
174
175 eval "$oldOpts"
176 '';
177
178 preConfigure =
179 (originalAttrs.preConfigure or "")
180 + ''
181 if test -n "$newlibSrc"; then
182 tar xvf "$newlibSrc" -C ..
183 ln -s ../newlib-*/newlib newlib
184 # Patch to get armvt5el working:
185 sed -i -e 's/ arm)/ arm*)/' newlib/configure.host
186 fi
187
188 # Bug - they packaged zlib
189 if test -d "zlib"; then
190 # This breaks the build without-headers, which should build only
191 # the target libgcc as target libraries.
192 # See 'configure:5370'
193 rm -Rf zlib
194 fi
195
196 if test -n "$crossMingw" -a -n "$withoutTargetLibc"; then
197 mkdir -p ../mingw
198 # --with-build-sysroot expects that:
199 cp -R $libcCross/include ../mingw
200 appendToVar configureFlags "--with-build-sysroot=`pwd`/.."
201 fi
202
203 # Perform the build in a different directory.
204 mkdir ../build
205 cd ../build
206 configureScript=../$sourceRoot/configure
207 '';
208
209 postConfigure = ''
210 # Avoid store paths when embedding ./configure flags into gcc.
211 # Mangled arguments are still useful when reporting bugs upstream.
212 sed -e "/TOPLEVEL_CONFIGURE_ARGUMENTS=/ s|$NIX_STORE/[a-z0-9]\{32\}-|$NIX_STORE/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-|g" -i Makefile
213 '';
214
215 preInstall =
216 # What follows is a horribly cursed hack.
217 #
218 # GCC will install its libraries to $out/lib, $out/lib32, $out/lib64,
219 # $out/$targetConfig/lib, $out/$targetConfig/lib32 or $out/$targetConfig/lib64,
220 # depending on whether it's built as native or cross, and the exact target spec.
221 #
222 # We can't predict what it's actually going to do, and we also can't just tell it
223 # to always install to lib, but we want everything to end up in lib
224 # for consistency (multilib weirdness aside).
225 #
226 # So, we create a bunch of symlinks before we run GCC's install phase,
227 # redirecting every possible directory it may want to write to to the place
228 # we actually want things to be installed.
229 # We will then nuke the symlinks in postInstall.
230 #
231 # FIXME: there must be a better way to do this.
232 ''
233 declare -ga compatibilitySymlinks=()
234
235 makeCompatibilitySymlink() {
236 declare -a outputsToLink=("$out")
237
238 if [ -n "$lib" ]; then
239 outputsToLink+=("$lib")
240 fi
241
242 for output in "''${outputsToLink[@]}"; do
243 local linkTarget="$1"
244 local linkName="$output/$2"
245
246 echo "Creating compatibility symlink: $linkTarget -> $linkName"
247
248 mkdir -p "$(dirname "$linkName")"
249 ln -s "$linkTarget" "$linkName"
250 compatibilitySymlinks+=("$linkName")
251 done
252 }
253 ''
254 +
255 # This will redirect $output/lib{32,64} to $output/lib.
256 # Multilib is special, because it creates $out/lib (for 32-bit)
257 # and $out/lib64 (for 64-bit). No other targets can have both.
258 lib.optionalString (!enableMultilib) ''
259 makeCompatibilitySymlink lib lib32
260 makeCompatibilitySymlink lib lib64
261 ''
262 +
263 # This will redirect $output/$targetConfig/lib{,32,64} to $output/$targetConfig/lib.
264 lib.optionalString isCross ''
265 makeCompatibilitySymlink lib $targetConfig/lib32
266 makeCompatibilitySymlink lib $targetConfig/lib64
267 '';
268
269 postInstall =
270 ''
271 # Clean up our compatibility symlinks (see above)
272 for link in "''${compatibilitySymlinks[@]}"; do
273 echo "Removing compatibility symlink: $link"
274 rm -f "$link"
275 done
276
277 # Move target runtime libraries to lib output.
278 # For non-cross, they're in $out/lib; for cross, they're in $out/$targetConfig/lib.
279 targetLibDir="''${targetConfig+$targetConfig/}lib"
280
281 moveToOutput "$targetLibDir/lib*.so*" "''${!outputLib}"
282 moveToOutput "$targetLibDir/lib*.dylib" "''${!outputLib}"
283 moveToOutput "$targetLibDir/lib*.dll.a" "''${!outputLib}"
284 moveToOutput "$targetLibDir/lib*.dll" "''${!outputLib}"
285 moveToOutput "share/gcc-*/python" "''${!outputLib}"
286
287 if [ -z "$enableShared" ]; then
288 moveToOutput "$targetLibDir/lib*.a" "''${!outputLib}"
289 fi
290
291 for i in "''${!outputLib}"/$targetLibDir/*.py; do
292 substituteInPlace "$i" --replace "$out" "''${!outputLib}"
293 done
294
295 # Multilib and cross can't exist at the same time, so just use lib64 here
296 if [ -n "$enableMultilib" ]; then
297 moveToOutput "lib64/lib*.so*" "''${!outputLib}"
298 moveToOutput "lib64/lib*.dylib" "''${!outputLib}"
299 moveToOutput "lib64/lib*.dll.a" "''${!outputLib}"
300 moveToOutput "lib64/lib*.dll" "''${!outputLib}"
301
302 for i in "''${!outputLib}"/lib64/*.py; do
303 substituteInPlace "$i" --replace "$out" "''${!outputLib}"
304 done
305 fi
306
307 # Remove `fixincl' to prevent a retained dependency on the
308 # previous gcc.
309 rm -rf $out/libexec/gcc/*/*/install-tools
310 rm -rf $out/lib/gcc/*/*/install-tools
311
312 # More dependencies with the previous gcc or some libs (gccbug stores the build command line)
313 rm -rf $out/bin/gccbug
314
315 # Remove .la files, they're not adjusted for the makeCompatibilitySymlink magic,
316 # which confuses libtool and leads to weird linking errors.
317 # Removing the files just makes libtool link .so files directly, which is usually
318 # what we want anyway.
319 find $out -name '*.la' -delete
320
321 if type "install_name_tool"; then
322 for i in "''${!outputLib}"/lib/*.*.dylib "''${!outputLib}"/lib/*.so.[0-9]; do
323 install_name_tool -id "$i" "$i" || true
324 for old_path in $(otool -L "$i" | grep "$out" | awk '{print $1}'); do
325 new_path=`echo "$old_path" | sed "s,$out,''${!outputLib},"`
326 install_name_tool -change "$old_path" "$new_path" "$i" || true
327 done
328 done
329 fi
330
331 # Get rid of some "fixed" header files
332 rm -rfv $out/lib/gcc/*/*/include-fixed/{root,linux,sys/mount.h,bits/statx.h,pthread.h}
333
334 # Replace hard links for i686-pc-linux-gnu-gcc etc. with symlinks.
335 for i in $out/bin/*-gcc*; do
336 if cmp -s $out/bin/gcc $i; then
337 ln -sfn gcc $i
338 fi
339 done
340
341 for i in $out/bin/c++ $out/bin/*-c++* $out/bin/*-g++*; do
342 if cmp -s $out/bin/g++ $i; then
343 ln -sfn g++ $i
344 fi
345 done
346
347 # Two identical man pages are shipped (moving and compressing is done later)
348 for i in "$out"/share/man/man1/*g++.1; do
349 if test -e "$i"; then
350 man_prefix=`echo "$i" | sed "s,.*/\(.*\)g++.1,\1,"`
351 ln -sf "$man_prefix"gcc.1 "$i"
352 fi
353 done
354 ''
355 # if cross-compiling, link from $lib/lib to $lib/${targetConfig}.
356 # since native-compiles have $lib/lib as a directory (not a
357 # symlink), this ensures that in every case we can assume that
358 # $lib/lib contains the .so files
359 + lib.optionalString isCross ''
360 if [ -e "$lib/$targetConfig/lib" ]; then
361 ln -s "$lib/$targetConfig/lib" "$lib/lib"
362 fi
363 '';
364 }
365))