added extra/jemalloc

closes #1914

extra/jemalloc/PKGBUILD

@@ -0,0 +1,45 @@
+# Maintainer:  Bartłomiej Piotrowski <bpiotrowski@archlinux.org>
+# Contributor: Massimiliano Torromeo <massimiliano.torromeo@gmail.com>
+# Contributor: Kovivchak Evgen <oneonfire@gmail.com>
+
+# ALARM: Hayden Seay <me@diatr.us>
+#  - build with 16 KiB page sizes on arm.
+
+pkgname=jemalloc
+epoch=1
+pkgver=5.3.0
+pkgrel=1.1
+pkgdesc='General-purpose scalable concurrent malloc implementation'
+arch=('x86_64')
+license=('BSD')
+url='http://www.canonware.com/jemalloc/'
+depends=('glibc')
+makedepends=('clang')
+options=('!lto')
+provides=('libjemalloc.so')
+optdepends=('perl: for jeprof')
+source=("https://github.com/jemalloc/jemalloc/releases/download/${pkgver}/${pkgname}-${pkgver}.tar.bz2")
+sha256sums=('2db82d1e7119df3e71b7640219b6dfe84789bc0537983c3b7ac4f7189aecfeaa')
+
+build() {
+  cd $pkgname-$pkgver
+
+  # FS#71745: GCC-built jemalloc causes telegram-desktop to crash a lot. The reason is still not clear.
+  export CC=clang
+  export CXX=clang++
+
+  [[ $CARCH == "aarch64" ]] && CONFIG="--with-lg-page=14"
+  ./configure \
+    --enable-autogen \
+    --prefix=/usr $CONFIG
+  make
+}
+
+package() {
+  cd $pkgname-$pkgver
+
+  make DESTDIR="$pkgdir" install
+
+  install -Dm644 COPYING "$pkgdir/usr/share/licenses/$pkgname/COPYING"
+  chmod 644 "$pkgdir/usr/lib/libjemalloc_pic.a"
+}