From c6ae3df7df5e348d07262ed42d3d0899e27c8f02 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Sun, 13 Jun 2021 07:28:30 +0000
Subject: build system: configure, ccenv: enhanced --sysroot logic.

---
 configure             | 9 ++++++++-
 sofort/ccenv/ccenv.sh | 6 ++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index 459e57d..b32b086 100755
--- a/configure
+++ b/configure
@@ -813,8 +813,15 @@ config_ccenv()
 	output_section_break
 	ccenv_set_native_variables
 
+	# implicit --sysroot for use with pkgconf and friends
+	if [ -z "$mb_sysroot" ]; then
+		mb_sysroot="$ccenv_host_sysroot"
+	fi
+
 	# require --sysroot when cross-compiling
-	if [ "$mb_cchost" != "$mb_native_cchost" ] && [ -z "$mb_sysroot" ]; then
+	if [ "$mb_cchost" != "$mb_native_cchost" ]                   \
+			&& [ "$ccenv_host_cc" != "$ccenv_native_cc" ] \
+			&& [ -z "$mb_sysroot" ]; then
 		mb_pretty=$(printf "%-${#mb_package}s" '')
 
 		error_msg ' !!'
diff --git a/sofort/ccenv/ccenv.sh b/sofort/ccenv/ccenv.sh
index 464b309..a13aa07 100644
--- a/sofort/ccenv/ccenv.sh
+++ b/sofort/ccenv/ccenv.sh
@@ -28,8 +28,10 @@
 # variables available to cfgdefs.sh and cfgfini.sh:
 # ccenv_host_cflags:    expanded cflags, valid for the host compiler
 # ccenv_host_ldflags:   expanded ldflags, valid for the host compiler
+# ccenv_host_sysroot:   host sysroot, as reported by the host compiler
 # ccenv_native_cflags:  expanded cflags, valid for the native compiler
 # ccenv_native_ldflags: expanded ldflags, valid for the native compiler
+# ccenv_native_sysroot: native sysroot, as reported by the native compiler
 
 ccenv_usage()
 {
@@ -1507,8 +1509,12 @@ ccenv_output_defs()
 	ccenv_cflags="${ccenv_cflags#*: }"
 	ccenv_ldflags="${ccenv_ldflags#*: }"
 
+	ccenv_sysroot=$(eval $ccenv_cc $(printf '%s' "$ccenv_cflags") \
+		-print-sysroot 2>/dev/null || true)
+
 	eval 'ccenv_'${ccenv_cfgtype}'_cflags'=\'$ccenv_cflags\'
 	eval 'ccenv_'${ccenv_cfgtype}'_ldflags'=\'$ccenv_ldflags\'
+	eval 'ccenv_'${ccenv_cfgtype}'_sysroot'=\'$ccenv_sysroot\'
 
 	eval 'ccenv_'${ccenv_cfgtype}'_cc'=\'$ccenv_cc\'
 	eval 'ccenv_'${ccenv_cfgtype}'_cc_environment'=\'$ccenv_cc_environment\'
-- 
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