[Pkg-pascal-devel] Bug#784569: fpc: fpc on arm64

[Edmund Grimley Evans]

Here's a recipe for generating fpc-arm64-part1.patch, or something
very like it:

mkdir a b
wget http://http.debian.net/debian/pool/main/f/fpc/fpc_3.0.0~rc1+dfsg.orig.tar.gz
tar xzf fpc_3.0.0~rc1+dfsg.orig.tar.gz -C a --strip-components=1
svn export http://svn.freepascal.org/svn/fpc/branches/fixes_3_0_ios b/fpcsrc

rm `find [ab]/fpcsrc -name Makefile`
rm `find b -name '*.[ao]' -o -name '*.exe'`

( cd b && ../a/install/updfpmkver 3.0.0rc1 )
( cd b && ../a/install/updmkver 3.0.0rc1 true )
cp -rT [ab]/fpcsrc/installer
cp -rT [ab]/fpcsrc/packages/chm
cp -rT [ab]/fpcsrc/packages/fuse
perl -i -pe "s/(patch_nr\s*=\s*)'.*'/\$1'0'/;" b/fpcsrc/compiler/version.pas
perl -i -pe "s/(minorpatch\s*=\s*)'.*'/\$1'rc1'/;" b/fpcsrc/compiler/version.pas
git diff --no-prefix [ab]/fpcsrc > diff



Pedantic footnote: Generating a reproducible diff is surprisingly
difficult. It seems that different versions of git order files
slightly differently (x.a <> x/b), and there's some variation in
whether to use

diff --git a/foo b/foo

or

diff --bit b/foo b/foo

when the patch adds a new file.