From 3d20f50252c5d3a08c983510193af9656bb47c89 Mon Sep 17 00:00:00 2001
From: bill-auger <mr.j.spam.me@gmail.com>
Date: Fri, 28 Aug 2020 14:51:15 -0400
Subject: [iceweasel]: refactor per-arch configuration

---
 libre/iceweasel/PKGBUILD | 106 +++++++++++++++++++++++++----------------------
 1 file changed, 56 insertions(+), 50 deletions(-)

diff --git a/libre/iceweasel/PKGBUILD b/libre/iceweasel/PKGBUILD
index cbcefb60e..39a5fcf75 100644
--- a/libre/iceweasel/PKGBUILD
+++ b/libre/iceweasel/PKGBUILD
@@ -96,7 +96,10 @@ validpgpkeys+=('BFA8008A8265677063B11BF47171986E4B745536') # Andreas Grapentin
 validpgpkeys+=('3954A7AB837D0EA9CFA9798925DB7D9B5A8D4B40') # bill-auger
 
 
-_x86_64_skip_pgo=0
+_should_skip_pgo_armv7h=1
+_should_skip_pgo_i686=1
+_should_skip_pgo_x86_64=0
+eval "_should_skip_pgo=\$_should_skip_pgo_${CARCH}"
 
 
 prepare() {
@@ -342,19 +345,12 @@ build() {
 
   ## [ARCH-SPECIFIC BUILD ENV] ##
 
-  if [[ $CARCH != armv7h ]]; then
-    # -fno-plt with cross-LTO causes obscure LLVM errors
-    # LLVM ERROR: Function Import: link error
-    CFLAGS="${CFLAGS/-fno-plt/}"
-    CXXFLAGS="${CXXFLAGS/-fno-plt/}"
-  fi
-  if [[ $CARCH != i686 ]]; then
-    # clang-9: error: unknown argument: '-fvar-tracking-assignments'
-    CFLAGS="${CFLAGS/-fvar-tracking-assignments/}"
-    CXXFLAGS="${CXXFLAGS/-fvar-tracking-assignments/}"
-  fi
   case ${CARCH} in
     armv7h)
+      # clang-9: error: unknown argument: '-fvar-tracking-assignments'
+      CFLAGS="${CFLAGS/-fvar-tracking-assignments/}"
+      CXXFLAGS="${CXXFLAGS/-fvar-tracking-assignments/}"
+
       export MOZ_DEBUG_FLAGS=" "
       export CFLAGS+=" -g0"
       export CXXFLAGS+=" -g0"
@@ -362,6 +358,10 @@ build() {
       export RUSTFLAGS="-Cdebuginfo=0"
     ;;
     i686)
+      # -fno-plt with cross-LTO -> LLVM ERROR: Function Import: link error
+      CFLAGS="${CFLAGS/-fno-plt/}"
+      CXXFLAGS="${CXXFLAGS/-fno-plt/}"
+
       # disable LTO (clang has issues on IA32)
       export RUSTFLAGS+=" -Cdebuginfo=0 -Clto=off"
       export LDFLAGS+=" -Wl,--no-keep-memory -Wl,--reduce-memory-overheads"
@@ -373,6 +373,20 @@ build() {
       export CFLAGS+=" -mmmx"
       export CXXFLAGS+=" -mmmx"
     ;;
+    x86_64)
+      # -fno-plt with cross-LTO -> LLVM ERROR: Function Import: link error
+      CFLAGS="${CFLAGS/-fno-plt/}"
+      CXXFLAGS="${CXXFLAGS/-fno-plt/}"
+
+      # clang-9 -> error: unknown argument: '-fvar-tracking-assignments'
+      CFLAGS="${CFLAGS/-fvar-tracking-assignments/}"
+      CXXFLAGS="${CXXFLAGS/-fvar-tracking-assignments/}"
+
+      export CFLAGS
+      export CXXFLAGS
+    ;;
+    *) echo "no [ARCH-SPECIFIC BUILD ENV] for arch: ${CARCH}" ; return 1 ;
+    ;;
   esac
 
 
@@ -380,62 +394,54 @@ build() {
 
   case ${CARCH} in
     armv7h)
-      # skipping PGO "instrumented browser"; so we have the final .mozconfig now
-      cp ../mozconfig .mozconfig
     ;;
     i686)
-      # do not do profiling on i686: ..or it will for sure run out of memory - it doesn't find libraries:
-      # "XPCOMGlueLoad error for file /build/firefox/src/firefox-70.0/obj-i686-pc-linux-gnu/dist/firefox/libxul.so:
-      # libmozsandbox.so: cannot open shared object file: No such file or directory
-      # Couldn't load XPCOM."
-
       # avoid excessive debug symbols in rust leading to out-of-memory situations
       sed -i "s/debug_info = '\''2'\''/debug_info = '\''0'\''/" build/moz.configure/toolchain.configure
-
-      # skipping PGO "instrumented browser"; so we have the final .mozconfig now
-      cp ../mozconfig .mozconfig
     ;;
     x86_64)
-      if (( $_x86_64_skip_pgo ))
-      then
-        # skipping PGO "instrumented browser"; so we have the final .mozconfig now
-        cp ../mozconfig .mozconfig
-      else
-        # Do 3-tier PGO
-        echo "Building instrumented browser..."
-        cat >.mozconfig ../mozconfig - <<END
+    ;;
+    *) echo "no [ARCH-SPECIFIC BUILD CONFIG] for arch: ${CARCH}" ; return 1 ;
+    ;;
+  esac
+
+  if (( $_should_skip_pgo ))
+  then
+    # skipping "3-tier PGO" "instrumented browser", to avoid OOM problems;
+    # so we have the final .mozconfig now
+    cp ../mozconfig .mozconfig
+  else
+    # Do 3-tier PGO
+    echo "Building instrumented browser..."
+    cat >.mozconfig ../mozconfig - <<END
 ac_add_options --enable-profile-generate=cross
 END
-        _check_build_config
-        ./mach build
+    _check_build_config
+    ./mach build
 
-        echo "Profiling instrumented browser..."
-        ./mach package
-        LLVM_PROFDATA=llvm-profdata \
-          JARLOG_FILE="$PWD/jarlog" \
-          xvfb-run -s "-screen 0 1920x1080x24 -nolisten local" \
-          ./mach python build/pgo/profileserver.py
+    echo "Profiling instrumented browser..."
+    ./mach package
+    LLVM_PROFDATA=llvm-profdata \
+      JARLOG_FILE="$PWD/jarlog" \
+      xvfb-run -s "-screen 0 1920x1080x24 -nolisten local" \
+      ./mach python build/pgo/profileserver.py
 
-        stat -c "Profile data found (%s bytes)" merged.profdata
-        test -s merged.profdata
+    stat -c "Profile data found (%s bytes)" merged.profdata
+    test -s merged.profdata
 
-        stat -c "Jar log found (%s bytes)" jarlog
-        test -s jarlog
+    stat -c "Jar log found (%s bytes)" jarlog
+    test -s jarlog
 
-        echo "Removing instrumented browser..."
-        ./mach clobber
+    echo "Removing instrumented browser..."
+    ./mach clobber
 
-        cat >.mozconfig ../mozconfig - <<END
+    cat >.mozconfig ../mozconfig - <<END
 ac_add_options --enable-lto=cross
 ac_add_options --enable-profile-use=cross
 ac_add_options --with-pgo-profile-path=${PWD@Q}/merged.profdata
 ac_add_options --with-pgo-jarlog=${PWD@Q}/jarlog
 END
-      fi # $_x86_64_skip_pgo
-    ;;
-    *) echo "no [ARCH-SPECIFIC BUILD CONFIG] for arch: ${CARCH}" ; return 1 ;
-    ;;
-  esac
+  fi # $_skip_pgo
 
 
   ## sanity checks ##
-- 
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