bpo-39761: Fix dtrace build with empty $DFLAGS (GH-18766)
This fixes a regression introduced in bpo-38960.
When DFLAGS was empty, "$DFLAGS" results in an empty argument ("").
Without the quotes, an empty variable will be ignored by the shell.diff --git a/Misc/NEWS.d/next/Build/2020-03-03-15-56-07.bpo-39761.k10aGe.rst b/Misc/NEWS.d/next/Build/2020-03-03-15-56-07.bpo-39761.k10aGe.rst
new file mode 100644
index 0000000..e3f17cf
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2020-03-03-15-56-07.bpo-39761.k10aGe.rst
@@ -0,0 +1 @@
+Fix build with DTrace but without additional DFLAGS.
diff --git a/configure b/configure
index d1ec709..893d0e1 100755
--- a/configure
+++ b/configure
@@ -11487,7 +11487,7 @@
else
ac_cv_dtrace_link=no
echo 'BEGIN{}' > conftest.d
- "$DTRACE" "$DFLAGS" -G -s conftest.d -o conftest.o > /dev/null 2>&1 && \
+ "$DTRACE" $DFLAGS -G -s conftest.d -o conftest.o > /dev/null 2>&1 && \
ac_cv_dtrace_link=yes
fi
diff --git a/configure.ac b/configure.ac
index 38598c4..8eed015 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3541,7 +3541,7 @@
[ac_cv_dtrace_link], [dnl
ac_cv_dtrace_link=no
echo 'BEGIN{}' > conftest.d
- "$DTRACE" "$DFLAGS" -G -s conftest.d -o conftest.o > /dev/null 2>&1 && \
+ "$DTRACE" $DFLAGS -G -s conftest.d -o conftest.o > /dev/null 2>&1 && \
ac_cv_dtrace_link=yes
])
if test "$ac_cv_dtrace_link" = "yes"; then