[gnurl] 03/264: configure: convert -I to -isystem as a last step

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nikita pushed a commit to branch master
in repository gnurl.

commit 27ea8fc2faa4e4753a9cff0a7f48d1dba68013d6
Author: Daniel Stenberg <address@hidden>
AuthorDate: Sun Mar 8 11:08:13 2020 +0100

    configure: convert -I to -isystem as a last step
    
    As all the -I uses in CFLAGS at that point are for system headers and
    third party libraries this helps us remove/ignore warnings on those!
    
    Closes #5060
---
 configure.ac         | 2 ++
 m4/curl-compilers.m4 | 9 ++++-----
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/configure.ac b/configure.ac
index 4f4aeb91b..973394bce 100755
--- a/configure.ac
+++ b/configure.ac
@@ -4259,6 +4259,8 @@ if test "$want_thres" = "yes" && test 
"x$USE_THREADS_POSIX" != "x1"; then
   fi
 fi
 
+CURL_CONVERT_INCLUDE_TO_ISYSTEM
+
 dnl ************************************************************
 dnl disable verbose text strings
 dnl
diff --git a/m4/curl-compilers.m4 b/m4/curl-compilers.m4
index 79460b6d2..196b285be 100644
--- a/m4/curl-compilers.m4
+++ b/m4/curl-compilers.m4
@@ -452,8 +452,10 @@ dnl GNUC versions these warnings are not silenced.
 AC_DEFUN([CURL_CONVERT_INCLUDE_TO_ISYSTEM], [
   AC_REQUIRE([CURL_SHFUNC_SQUEEZE])dnl
   AC_REQUIRE([CURL_CHECK_COMPILER])dnl
+  AC_MSG_CHECKING([convert -I options to -isystem])
   if test "$compiler_id" = "GNU_C" ||
     test "$compiler_id" = "CLANG"; then
+    AC_MSG_RESULT([yes])
     tmp_has_include="no"
     tmp_chg_FLAGS="$CFLAGS"
     for word1 in $tmp_chg_FLAGS; do
@@ -484,6 +486,8 @@ AC_DEFUN([CURL_CONVERT_INCLUDE_TO_ISYSTEM], [
       CPPFLAGS="$tmp_chg_FLAGS"
       squeeze CPPFLAGS
     fi
+  else
+    AC_MSG_RESULT([no])
   fi
 ])
 
@@ -569,11 +573,6 @@ AC_DEFUN([CURL_SET_COMPILER_BASIC_OPTS], [
   AC_REQUIRE([CURL_SHFUNC_SQUEEZE])dnl
   #
   if test "$compiler_id" != "unknown"; then
-    #
-    if test "$compiler_id" = "GNU_C" ||
-      test "$compiler_id" = "CLANG"; then
-      CURL_CONVERT_INCLUDE_TO_ISYSTEM
-    fi
     #
     tmp_save_CPPFLAGS="$CPPFLAGS"
     tmp_save_CFLAGS="$CFLAGS"

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