From 14b5544d8b6d72c1e11e9732f42502fb9003700a Mon Sep 17 00:00:00 2001
From: "Victor A. P. Magri" <50467563+victorapm@users.noreply.github.com>
Date: Tue, 17 Oct 2023 10:28:34 -0400
Subject: [PATCH] Fix regressions (#988)

* CMake uses C99 by default
* HYPRE_PRINT_INDENT works without a loop
---
 src/CMakeLists.txt               | 3 +++
 src/utilities/_hypre_utilities.h | 6 ++----
 src/utilities/matrix_stats.h     | 6 ++----
 3 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index dabcb35ef..00322ba6b 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -24,6 +24,9 @@ project(${PROJECT_NAME}
   VERSION ${HYPRE_VERSION}
   LANGUAGES C)
 
+# We use C99 by default, but users are free to specify any newer standard version
+set(CMAKE_C_STANDARD 99)
+
 if (${HYPRE_SOURCE_DIR} STREQUAL ${HYPRE_BINARY_DIR})
   message(FATAL_ERROR "In-place build not allowed! Please use a separate build directory. See the Users Manual or INSTALL file for details.")
 endif ()
diff --git a/src/utilities/_hypre_utilities.h b/src/utilities/_hypre_utilities.h
index 11f064f5a..2a9ae9080 100644
--- a/src/utilities/_hypre_utilities.h
+++ b/src/utilities/_hypre_utilities.h
@@ -395,10 +395,8 @@ typedef struct hypre_MatrixStatsArray_struct
    hypre_printf(" %s\n", msg);
 
 #define HYPRE_PRINT_INDENT(n)                       \
-   for (HYPRE_Int __i = 0; __i < n; __i++)          \
-   {                                                \
-      hypre_printf(" ");                            \
-   }
+   hypre_printf("%*s", (n > 0) ? n : 0, "");
+
 
 #define HYPRE_PRINT_SHIFTED_PARAM(n, ...)           \
    HYPRE_PRINT_INDENT(n)                            \
diff --git a/src/utilities/matrix_stats.h b/src/utilities/matrix_stats.h
index 925610100..e583868ed 100644
--- a/src/utilities/matrix_stats.h
+++ b/src/utilities/matrix_stats.h
@@ -118,10 +118,8 @@ typedef struct hypre_MatrixStatsArray_struct
    hypre_printf(" %s\n", msg);
 
 #define HYPRE_PRINT_INDENT(n)                       \
-   for (HYPRE_Int __i = 0; __i < n; __i++)          \
-   {                                                \
-      hypre_printf(" ");                            \
-   }
+   hypre_printf("%*s", (n > 0) ? n : 0, "");
+
 
 #define HYPRE_PRINT_SHIFTED_PARAM(n, ...)           \
    HYPRE_PRINT_INDENT(n)                            \