Remove -Wno-deprecated-declarations from root-config --cflags: we want that to work.

config/root-config.in

@@ -194,7 +194,7 @@ solaris64CC5)
    ;;
 linux)
    # Linux with gcc >= 3.x
-   auxcflags="${cxxversionflag} -Wno-deprecated-declarations -m32 -msse -mfpmath=sse "
+   auxcflags="${cxxversionflag} -m32 -msse -mfpmath=sse "
    auxldflags="-m32 -msse -mfpmath=sse "
    auxlibs="-lm -ldl -rdynamic"
    ;;
@@ -205,19 +205,19 @@ linuxicc)
    ;;
 linuxppcgcc)
    # PPC Linux with gcc
-   auxcflags="${cxxversionflag} -Wno-deprecated-declarations -m32 -fsigned-char"
+   auxcflags="${cxxversionflag} -m32 -fsigned-char"
    auxldflags="-m32"
    auxlibs="-lm -ldl -rdynamic"
    ;;
 linuxppc64gcc)
    # PPC64/PPC64LE (64 bit mode) Linux with gcc
-   auxcflags="${cxxversionflag} -Wno-deprecated-declarations -m64 -fsigned-char"
+   auxcflags="${cxxversionflag} -m64 -fsigned-char"
    auxldflags="-m64"
    auxlibs="-lm -ldl -rdynamic"
    ;;
 linuxx8664gcc)
    # AMD Opteron and Intel EM64T (64 bit mode) Linux with gcc 3.x
-   auxcflags="${cxxversionflag} -Wno-deprecated-declarations -m64"
+   auxcflags="${cxxversionflag} -m64"
    auxldflags="-m64"
    auxlibs="-lm -ldl -rdynamic"
    ;;
@@ -233,7 +233,7 @@ linuxx8664k1omicc)
    ;;
 linuxx32gcc)
    # x32 ABI (64 bit mode with 32 bit pointers) Linux with gcc > 4.7
-   auxcflags="${cxxversionflag} -Wno-deprecated-declarations -mx32"
+   auxcflags="${cxxversionflag} -mx32"
    auxldflags="-mx32"
    auxlibs="-lm -ldl -rdynamic"
    ;;
@@ -249,22 +249,22 @@ linuxarm64)
    ;;
 freebsd)
    # FreeBSD with libc5
-   auxcflags="${cxxversionflag} -Wno-deprecated-declarations"
+   auxcflags="${cxxversionflag}"
    auxlibs="-lm -lg++"
    ;;
 freebsd4)
    # FreeBSD 4 with glibc
-   auxcflags="${cxxversionflag} -Wno-deprecated-declarations"
+   auxcflags="${cxxversionflag}"
    auxlibs="-lm -lstdc++"
    ;;
 freebsd5|freebsd7)
    # FreeBSD 5/7 with glibc
-   auxcflags="${cxxversionflag} -Wno-deprecated-declarations"
+   auxcflags="${cxxversionflag}"
    auxlibs="-lm -lstdc++"
    ;;
 openbsd)
    # OpenBSD with libc
-   auxcflags="${cxxversionflag} -Wno-deprecated-declarations"
+   auxcflags="${cxxversionflag}"
    auxlibs="-lm -lstdc++"
    ;;
 macosx)