Do not append "-ansi" to CXXFLAG, if "-std=XXX" is already specified.

SplashOutputDev.cc uses isfinite() function (defined by math.h).
isfinite() was standardized in C99, and imported to C++0x in later.

In QNX header file system, isfinite() is disabled by default,
the definition of __STDC_VERSION__ > 199901 is required to enable it.
In the case of GCC, "-std=c99" (for C) or "-std=gnu++0x" (for C++)
is expected.

But, current configure of poppler appends "-ansi" flag for CXXFLAGS,
if the compiler is known to be GNU. "-ansi" is C89 or C++98, so isfinite()
is unavailable. I propose a patch NOT to "-ansi" flag, if CXXFLAGS
includes "-std=XXX" already.

1 files changed, 7 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index d7f7f868..2e3be7c2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -31,7 +31,13 @@ if test "x$GXX" = "xyes"; then
     cygwin* | mingw*)
     ;;
     *)
-      CXXFLAGS="$CXXFLAGS -ansi"
+      case "${CXXFLAGS}" in
+      *-std=*)
+        ;;
+      *)
+        CXXFLAGS="$CXXFLAGS -ansi"
+        ;;
+      esac
     ;;
   esac
 fi