Re: ./configure --with-native-compilation on macos (11.5.2 Big Sur)

[Alan Third <alan@idiocy.org>]

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On Wed, Sep 08, 2021 at 04:31:35PM +0100, Alan Third wrote:
> On Mon, Sep 06, 2021 at 06:45:58PM +0900, Jean-Christophe Helary wrote:
> > >>> What is the result of
> > >>> 
> > >>> port installed active | grep '^ *gcc@<:@0-9@:>@* ' | awk '{ print $1; }'
> > >> 
> > >> the result is a blank line
> <snip>
> > > Totally removing macports allowed me to properly run ./configure --with-native-compilation
> > > I am currently "make"ing emacs.
> > > 
> > > There are some apps that I need from macport so I'll reinstall it from scratch.
> > 
> > Alan,
> > 
> > I confirm that reinstalling llvm through macports makes the issue
> > appear again. So there is indeed a conflict between brew and
> > macports here.
> 
> Can you please send the output from 'port installed active'?

Actually, I took a second look at my change and may know why it wasn't
doing what I was expecting. Please try the attached.
-- 
Alan Third

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From 057f8b904de98e3133da6e9c1f82b1670ce8af5c Mon Sep 17 00:00:00 2001
From: Alan Third <alan@idiocy.org>
Date: Sun, 5 Sep 2021 14:04:45 +0100
Subject: [PATCH v2] Don't add flags when MacPorts is installed but GCC isn't

* configure.ac: Check whether there is any value in $PORT_PACKAGE
before trying to use it.
---
 configure.ac | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/configure.ac b/configure.ac
index 418a62fd5e..38f9b69458 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3840,12 +3840,14 @@ AC_DEFUN
       # instance).
       PORT_PACKAGE=$(port installed active | grep '^ *gcc@<:@0-9@:>@* ' | \
                           awk '{ print $1; }')
-      MACPORTS_LIBGCCJIT_INCLUDE=$(dirname $(port contents $PORT_PACKAGE | \
-                                           grep libgccjit.h))
-      MACPORTS_LIBGCCJIT_LIB=$(dirname $(port contents $PORT_PACKAGE | \
+      if test -n "$PORT_PACKAGE"; then
+        MACPORTS_LIBGCCJIT_INCLUDE=$(dirname $(port contents $PORT_PACKAGE | \
+                                             grep libgccjit.h))
+        MACPORTS_LIBGCCJIT_LIB=$(dirname $(port contents $PORT_PACKAGE | \
                                               grep libgccjit.dylib))
-      CFLAGS="$CFLAGS -I${MACPORTS_LIBGCCJIT_INCLUDE}"
-      LDFLAGS="$LDFLAGS -L${MACPORTS_LIBGCCJIT_LIB}"
+        CFLAGS="$CFLAGS -I${MACPORTS_LIBGCCJIT_INCLUDE}"
+        LDFLAGS="$LDFLAGS -L${MACPORTS_LIBGCCJIT_LIB}"
+      fi
     fi
 
     # Check if libgccjit is available.
-- 
2.30.2