R - 在 linux redhat 发行版上安装 processx 包时，仅在 C99 模式下允许使用“for”循环初始声明

Question

我想安装 processx 库，因为它是我正在使用的 BioConductor 包的必需包。使用 install.packages("processx") 时出现以下错误

错误

data(mtcars)
cars1 <- mtcars
cars2 <- mtcars

library(RODBC)
db <- odbcConnectAccess2007(db_file_path)
sqlSave(db, cars1, tablename = "MTCARS 1", fast = TRUE, safer = FALSE, rownames = FALSE, colnames = FALSE)
sqlSave(db, cars2, tablename = "MTCARS 2", fast = TRUE, safer = FALSE, rownames = FALSE, colnames = FALSE)
odbcClose(db)

我提到了 this post which provides a solution via the withr library。当我使用安装集群库时遇到类似问题时，它已经起作用了。我跑了

gcc -g -O2  -Wall tools/px.c -o tools/px
gcc -g -O2  supervisor/supervisor.c supervisor/utils.c \
      -o supervisor/supervisor
supervisor/supervisor.c: In function 'kill_children':
supervisor/supervisor.c:149:5: error: 'for' loop initial declarations are only allowed in C99 mode
     for (int i=0; i<n_children; i++) {
     ^
supervisor/supervisor.c:149:5: note: use option -std=c99 or -std=gnu99 to compile your code

我收到了同样的错误，所以我尝试通过

直接从命令行安装包

withr::with_makevars(c(PKG_CFLAGS = "-std=c99"), # Use C++ from '99
                     install.packages("processx"), 
                     assignment = "+=")
# Alternatively, I tried 
withr::with_makevars(c(PKG_CFLAGS = "-std=gnu99"), # Use C++ from '99
                     install.packages("processx"), 
                     assignment = "+=")

当我在安装 ggplot2 时收到相同的错误时，这有效。我在其他 stackoverflow 帖子中读过 gcc，但我不熟悉这个过程。任何帮助将不胜感激！

R 会话信息

R --no-save <<< "install.packages('processx', repos = 'http://cran.us.r-project.org')"