From 1ba848c57152fb4f47577255532043429d02f335 Mon Sep 17 00:00:00 2001
From: Tomi Ollila <tomi.ollila@iki.fi>
Date: Wed, 20 May 2015 11:48:28 +0300
Subject: [PATCH] Re: [PATCH] configure: Add sanity checking for environment
 variables

---
 7e/5efadca831689a9bebe125eed9302b4a4b2089 | 143 ++++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 7e/5efadca831689a9bebe125eed9302b4a4b2089

diff --git a/7e/5efadca831689a9bebe125eed9302b4a4b2089 b/7e/5efadca831689a9bebe125eed9302b4a4b2089
new file mode 100644
index 000000000..acd563b14
--- /dev/null
+++ b/7e/5efadca831689a9bebe125eed9302b4a4b2089
@@ -0,0 +1,143 @@
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+ Wed, 20 May 2015 11:48:28 +0300 (EEST)
+From: Tomi Ollila <tomi.ollila@iki.fi>
+To: David Bremner <david@tethera.net>, David Bremner <david@tethera.net>,
+ Ronny Chevalier <chevalier.ronny@gmail.com>
+Subject: Re: [PATCH] configure: Add sanity checking for environment variables
+In-Reply-To: <1432109551-16861-1-git-send-email-david@tethera.net>
+References: <m2617onuhh.fsf@guru.guru-group.fi>
+ <1432109551-16861-1-git-send-email-david@tethera.net>
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+Date: Wed, 20 May 2015 11:48:28 +0300
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+On Wed, May 20 2015, David Bremner <david@tethera.net> wrote:
+
+> Passing in environment variables incompatible with the compiler may
+> cause other parts of the configure script to fail in hard to
+> understand ways, so we abort early.
+> ---
+>
+> meh, the previous version was borken by lazy evaluation of CXXFLAGS
+> using make syntax. Better suggestions for how to do this?
+
+Final try, I promise ;D
+
+>
+>  configure | 31 +++++++++++++++++++++++++++++--
+>  1 file changed, 29 insertions(+), 2 deletions(-)
+>
+> diff --git a/configure b/configure
+> index 4af7ba9..650b976 100755
+> --- a/configure
+> +++ b/configure
+> @@ -269,6 +269,35 @@ dependencies are available:
+>  EOF
+>  
+>  errors=0
+> +printf "int main(void){return 0;}\n" > minimal.c
+> +
+> +printf "Sanity checking C compilation environment... "
+> +if ${CC} ${CFLAGS} ${CPPFLAGS}  minimal.c ${LDFLAGS} -o minimal > /dev/null 2>&1
+
+if ${CC} ${CFLAGS} ${CPPFLAGS} minimal.c ${LDFLAGS} -o minimal > /dev/null 2>&1
+
+> +then
+> +    printf "OK.\n"
+> +else
+> +    printf "Fail.\n"
+> +    errors=$((errors + 1))
+> +fi
+
+if [ "$CXXFLAGS" = '$(CFLAGS)' ]
+then
+   CXXFLAGS_for_sh=$CFLAGS
+else
+   CXXFLAGS_for_sh=$CXXFLAGS
+fi
+
+the above is basically safe as if there are slight chages in string
+'$(CFLAGS)' the CXXFLAGS_for_sh=$CXXFLAGS applies and if it is borken
+then we notice it.
+
+> +
+> +printf "Sanity checking C++ compilation environment... "
+> +if ${CXX} ${CXXFLAGS_for_sh} ${CPPFLAGS} minimal.c ${LDFLAGS} -o minimal > /dev/null 2>&1
+> +then
+> +    printf "OK.\n"
+> +else
+> +    printf "Fail.\n"
+> +    errors=$((errors + 1))
+> +fi
+
+unset CXXFLAGS_for_sh
+
+> +
+> +if [ $errors -gt 0 ]; then
+> +    cat <<EOF
+> +*** Error: Initial sanity checking of environment failed.  Please try
+> +running configure in a clean environment, and if the problem persists,
+> +report a bug.
+> +EOF
+> +    rm -f minimal minimal.c
+> +    exit 1
+> +fi
+>  
+>  if pkg-config --version > /dev/null 2>&1; then
+>      have_pkg_config=1
+> @@ -690,8 +719,6 @@ else
+>  fi
+>  rm -f compat/check_asctime
+>  
+> -printf "int main(void){return 0;}\n" > minimal.c
+> -
+>  printf "Checking for rpath support... "
+>  if ${CC} -Wl,--enable-new-dtags -Wl,-rpath,/tmp/ -o minimal minimal.c >/dev/null 2>&1
+>  then
+> -- 
+> 2.1.4
+>
+> _______________________________________________
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+> notmuch@notmuchmail.org
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-- 
2.26.2