Build Vim from 7.3 to the latest with 100 patches step on macOS (x86_64) with clang 12 (clang-1200.0.32.27)

buildvim.sh

#!/bin/bash
set -euxo pipefail

git clone https://github.com/vim/vim.git /tmp/vim
cd /tmp/vim

BACKUP_DIR=/tmp/vim-backup
mkdir -p "$BACKUP_DIR"

while true; do
  git restore .
  while ! git describe --tags | grep -E '^v\d[.]\d(?:[.]\d(?:\d*00)?)?$'; do
    git reset --hard HEAD^
  done
  gsed -i '/sizeof(uint32_t) != 4/,+1s/exit/return/' src/auto/configure # v8.2.1119
  gsed -i '/if (\(p\|res\|e1.*\) [!=]= NUL)/s/NUL/NULL/g' src/*.c # v8.0.0046
  gsed -i '/#define VV_NAME/s/, {0}$//' src/eval.c # v7.4.1648
  gsed -i '/static struct vimvar/,+4s/dictitem_T/dictitem16_T/;/char\s*vv_filler.*/d' src/eval.c # v7.4.1648
  if ! git grep 'struct dictitem16_S' src/structs.h >/dev/null; then
    gsed -i '/typedef struct dictitem_S dictitem_T;/a struct dictitem16_S {\n  typval_T di_tv;\n  char_u di_flags;\n  char_u di_key[17];\n};\ntypedef struct dictitem16_S dictitem16_T;' src/structs.h # v7.4.1648
  fi
  gsed -i 's/__ARGS(\(.*\))/\1/' src/proto/os_mac_conv.pro # v7.4.1202
  gsed -i 's/!builtin_first == i/(!builtin_first) == i/' src/term.c # v7.4.914
  gsed -i '/extern int sigaltstack/s/^/\/\//' src/os_unix.c # v8.0.1236
  gsed -i '/+multi_byte/,+6s/FEAT_BIG/FEAT_NORMAL/' src/feature.h # v7.3.968
  if ! ./configure; then
    make distclean || :
    rm -f auto/config.cache
    ./configure
  fi
  make -j8
  src/vim --version
  MAJOR=$(./src/vim --version | head -n 1 | awk '{ print $5 }' | tr -d '\n')
  MINOR=$(./src/vim --version | grep patch | awk '{ print $3 }' | sed -e 's/^[0-9]*-//g' | tr -d '\n' || :)
  cp src/vim "$BACKUP_DIR/vim-$MAJOR.$(printf "%04d" "$MINOR")"
  git reset --hard HEAD^
done